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These are the user uploaded subtitles that are being translated: 1 00:00:01,199 --> 00:00:06,640 In the wild, danger doesn't always come 2 00:00:03,840 --> 00:00:09,640 with claws, [music] fangs, or thunderous 3 00:00:06,640 --> 00:00:09,640 roars. 4 00:00:12,445 --> 00:00:17,039 [music] Sometimes the greatest threats 5 00:00:14,400 --> 00:00:20,400 hide inside the smallest creatures, 6 00:00:17,039 --> 00:00:23,720 silent, delicate, and almost impossible 7 00:00:20,400 --> 00:00:23,720 to notice. 8 00:00:25,359 --> 00:00:31,359 A single touch, a careless step, or a 9 00:00:28,880 --> 00:00:35,360 moment of curiosity can reveal one of 10 00:00:31,359 --> 00:00:38,360 evolution's most powerful weapons, 11 00:00:35,360 --> 00:00:38,360 venom. 12 00:00:41,920 --> 00:00:47,815 Across forests, deserts, and oceans, 13 00:00:45,200 --> 00:00:49,920 countless animals carry toxins capable 14 00:00:47,815 --> 00:00:53,039 [music] of paralyzing muscles, 15 00:00:49,920 --> 00:00:56,520 destroying tissue, or shutting down the 16 00:00:53,039 --> 00:00:56,520 human body. 17 00:00:59,039 --> 00:01:03,440 Some are legendary [music] 18 00:01:00,160 --> 00:01:05,760 predators feared for centuries. 19 00:01:03,440 --> 00:01:10,360 Others are so small and hidden that most 20 00:01:05,760 --> 00:01:10,360 people never realize they exist. 21 00:01:13,760 --> 00:01:18,000 Today we're going to explore some of the 22 00:01:15,680 --> 00:01:20,080 most venomous animals on Earth, 23 00:01:18,000 --> 00:01:23,280 discovering these incredible creatures 24 00:01:20,080 --> 00:01:26,000 and the environments where they live. So 25 00:01:23,280 --> 00:01:28,640 before we begin, make sure to leave a 26 00:01:26,000 --> 00:01:31,600 like on the video and subscribe to the 27 00:01:28,640 --> 00:01:34,320 channel if you're not already part of 28 00:01:31,600 --> 00:01:36,560 the journey. And now [music] 29 00:01:34,320 --> 00:01:41,560 let's step together into a world of 30 00:01:36,560 --> 00:01:41,560 fascination and danger. 31 00:01:46,320 --> 00:01:51,520 In forests and wooded areas across the 32 00:01:49,040 --> 00:01:54,240 southern [music] United States, Mexico, 33 00:01:51,520 --> 00:01:56,640 and parts of Central America, a small 34 00:01:54,240 --> 00:01:59,920 furry creature rests quietly [music] 35 00:01:56,640 --> 00:02:02,479 on leaves and tree branches. At first 36 00:01:59,920 --> 00:02:04,479 glance, it looks harmless, almost like a 37 00:02:02,479 --> 00:02:07,479 tiny tuft of cotton sitting on the 38 00:02:04,479 --> 00:02:07,479 vegetation. 39 00:02:08,319 --> 00:02:13,599 This is the puss caterpillar, the laral 40 00:02:11,200 --> 00:02:16,720 stage of [music] the flannel moth. And 41 00:02:13,599 --> 00:02:19,280 despite its soft appearance, it hides 42 00:02:16,720 --> 00:02:23,800 one of the most surprising defenses 43 00:02:19,280 --> 00:02:23,800 found in the insect world. 44 00:02:27,760 --> 00:02:33,599 Beneath that layer of silky hair lies an 45 00:02:30,480 --> 00:02:36,239 array of venomous [music] spines. Hidden 46 00:02:33,599 --> 00:02:38,560 under the soft fur are tiny hollow 47 00:02:36,239 --> 00:02:41,599 structures capable of delivering venom 48 00:02:38,560 --> 00:02:44,319 at the slightest touch. When pressure is 49 00:02:41,599 --> 00:02:47,840 applied, [music] these spines break and 50 00:02:44,319 --> 00:02:50,319 release toxins into the skin, causing an 51 00:02:47,840 --> 00:02:52,400 immediate and intense burning sensation 52 00:02:50,319 --> 00:02:55,400 designed to [music] drive predators 53 00:02:52,400 --> 00:02:55,400 away. 54 00:03:00,800 --> 00:03:05,360 In its daily life, the puss caterpillar 55 00:03:03,519 --> 00:03:06,400 moves slowly through leaves and 56 00:03:05,360 --> 00:03:09,280 branches, [music] 57 00:03:06,400 --> 00:03:11,200 feeding quietly on plant matter. Its 58 00:03:09,280 --> 00:03:14,239 fluffy appearance is not [music] just 59 00:03:11,200 --> 00:03:17,157 coincidence. It serves as a deceptive 60 00:03:14,239 --> 00:03:19,360 form of protection. What looks soft 61 00:03:17,157 --> 00:03:22,000 [music] and harmless can easily attract 62 00:03:19,360 --> 00:03:24,319 curiosity. And for an unsuspecting 63 00:03:22,000 --> 00:03:29,319 animal, that [music] curiosity can 64 00:03:24,319 --> 00:03:29,319 quickly turn into a painful lesson. 65 00:03:31,840 --> 00:03:36,959 In parts of southern [music] Mexico, 66 00:03:34,080 --> 00:03:39,040 where this species can also be found, 67 00:03:36,959 --> 00:03:41,760 nature reveals landscapes [music] of 68 00:03:39,040 --> 00:03:44,239 breathtaking beauty. In the state of 69 00:03:41,760 --> 00:03:46,239 Chiapas, the famous Elchifilon 70 00:03:44,239 --> 00:03:48,720 waterfalls cascade [music] through the 71 00:03:46,239 --> 00:03:50,799 forest, forming a series of brilliant 72 00:03:48,720 --> 00:03:53,599 turquoise pools and towering [music] 73 00:03:50,799 --> 00:03:56,879 streams of water that plunge through 74 00:03:53,599 --> 00:03:59,439 lush tropical vegetation. 75 00:03:56,879 --> 00:04:03,007 Surrounded by dense [music] greenery and 76 00:03:59,439 --> 00:04:04,879 mist rising from the falls, this small 77 00:04:03,007 --> 00:04:09,480 [music] caterpillar quietly lives its 78 00:04:04,879 --> 00:04:09,480 life among the leaves of the forest. 79 00:04:14,959 --> 00:04:18,400 For humans, [music] 80 00:04:16,239 --> 00:04:20,720 touching a puss caterpillar can be an 81 00:04:18,400 --> 00:04:23,440 extremely painful experience. [music] 82 00:04:20,720 --> 00:04:27,040 The sting can cause intense burning, 83 00:04:23,440 --> 00:04:29,199 swelling, nausea, headaches, and in some 84 00:04:27,040 --> 00:04:32,479 cases, [music] more serious reactions 85 00:04:29,199 --> 00:04:34,320 that require medical attention. Yet, the 86 00:04:32,479 --> 00:04:38,000 caterpillar does [music] not attack or 87 00:04:34,320 --> 00:04:40,998 pursue anyone. Its venom exists purely 88 00:04:38,000 --> 00:04:42,800 as a defense, a reminder that in nature, 89 00:04:40,998 --> 00:04:46,000 [music] even the softest looking 90 00:04:42,800 --> 00:04:49,800 creatures can hide an unexpected and 91 00:04:46,000 --> 00:04:49,800 powerful protection. 92 00:04:50,823 --> 00:04:52,843 [music] 93 00:05:14,720 --> 00:05:19,600 Deep within the dense rainforests of 94 00:05:16,960 --> 00:05:22,240 South America, hidden beneath fallen 95 00:05:19,600 --> 00:05:25,199 leaves, [music] rotting logs, and the 96 00:05:22,240 --> 00:05:27,520 damp soil of the jungle floor, lives a 97 00:05:25,199 --> 00:05:31,000 predator that many people never [music] 98 00:05:27,520 --> 00:05:31,000 see coming. 99 00:05:31,520 --> 00:05:37,280 The Amazonian [music] giant centipede is 100 00:05:34,320 --> 00:05:39,680 one of the largest centipedes on Earth. 101 00:05:37,280 --> 00:05:42,160 A fast and [music] powerful hunter, 102 00:05:39,680 --> 00:05:45,479 perfectly adapted to life in the shadows 103 00:05:42,160 --> 00:05:45,479 of the rainforest. 104 00:06:00,560 --> 00:06:05,919 Its venom is delivered through modified 105 00:06:02,720 --> 00:06:08,319 front legs [music] called foripules, 106 00:06:05,919 --> 00:06:11,039 sharp claw-like appendages [music] 107 00:06:08,319 --> 00:06:14,000 capable of injecting toxins directly 108 00:06:11,039 --> 00:06:17,039 into its prey. The venom contains a 109 00:06:14,000 --> 00:06:19,249 complex mix of compounds designed to 110 00:06:17,039 --> 00:06:21,360 immobilize small animals quickly, 111 00:06:19,249 --> 00:06:25,759 [music] allowing the centipede to 112 00:06:21,360 --> 00:06:30,120 overpower insects, rodents, amphibians, 113 00:06:25,759 --> 00:06:30,120 and [music] even small reptiles. 114 00:06:49,840 --> 00:06:54,240 Unlike many venomous animals that rely 115 00:06:52,000 --> 00:06:57,600 on camouflage and patience, [music] 116 00:06:54,240 --> 00:06:59,440 this centipede is an active hunter. It 117 00:06:57,600 --> 00:07:02,560 moves quickly across the forest [music] 118 00:06:59,440 --> 00:07:05,840 floor, using its sensitive antenna to 119 00:07:02,560 --> 00:07:08,479 detect vibrations and movement around 120 00:07:05,840 --> 00:07:12,080 it. In [music] the darkness beneath the 121 00:07:08,479 --> 00:07:14,269 canopy, it becomes a relentless predator 122 00:07:12,080 --> 00:07:14,800 capable of striking with surprising 123 00:07:14,269 --> 00:07:17,800 [music] 124 00:07:14,800 --> 00:07:17,800 speed. 125 00:07:41,919 --> 00:07:46,080 In the heart of the Amazon region, 126 00:07:44,319 --> 00:07:48,080 nature reveals one of the most 127 00:07:46,080 --> 00:07:50,720 fascinating natural spectacles [music] 128 00:07:48,080 --> 00:07:53,120 on Earth. Near the Brazilian city of 129 00:07:50,720 --> 00:07:55,599 Manouse occurs the famous meeting of the 130 00:07:53,120 --> 00:07:58,720 waters where the dark Rioenegro [music] 131 00:07:55,599 --> 00:08:01,919 and the sandy colored Rio Solyo flow 132 00:07:58,720 --> 00:08:04,639 side by side for several [music] kilome 133 00:08:01,919 --> 00:08:07,440 without mixing before eventually forming 134 00:08:04,639 --> 00:08:10,240 the mighty Amazon [music] River. 135 00:08:07,440 --> 00:08:13,599 Within this vast and vibrant rainforest 136 00:08:10,240 --> 00:08:15,599 ecosystem, the giant centipede moves 137 00:08:13,599 --> 00:08:18,599 silently across the jungle [music] 138 00:08:15,599 --> 00:08:18,599 floor. 139 00:08:35,279 --> 00:08:41,385 For humans, [music] encounters with this 140 00:08:37,680 --> 00:08:43,519 creature are rare but memorable. A bite 141 00:08:41,385 --> 00:08:46,320 [music] can cause intense pain, 142 00:08:43,519 --> 00:08:49,279 swelling, and inflammation, sometimes 143 00:08:46,320 --> 00:08:51,200 accompanied [music] by fever or nausea. 144 00:08:49,279 --> 00:08:54,480 Despite its intimidating appearance, the 145 00:08:51,200 --> 00:08:57,600 Amazonian giant centipede does not seek 146 00:08:54,480 --> 00:09:00,320 confrontation. Its venom exists to 147 00:08:57,600 --> 00:09:02,480 subdue [music] prey and defend itself in 148 00:09:00,320 --> 00:09:06,040 one of the most competitive ecosystems 149 00:09:02,480 --> 00:09:06,040 on the planet. 150 00:09:45,920 --> 00:09:50,800 Along [music] sandy seabeds in tropical 151 00:09:48,080 --> 00:09:53,436 and subtropical oceans, a strange 152 00:09:50,800 --> 00:09:57,800 predator lies almost completely buried 153 00:09:53,436 --> 00:09:57,800 [music] beneath the ocean floor. 154 00:09:58,080 --> 00:10:02,880 Only its eyes and mouth remain visible 155 00:10:00,399 --> 00:10:05,440 above the sand, patiently waiting for 156 00:10:02,880 --> 00:10:08,640 the perfect moment [music] to strike. 157 00:10:05,440 --> 00:10:10,467 This is the stargazer fish. A creature 158 00:10:08,640 --> 00:10:12,320 whose unusual appearance and hidden 159 00:10:10,467 --> 00:10:14,320 [music] abilities make it one of the 160 00:10:12,320 --> 00:10:18,120 most surprising predators of the 161 00:10:14,320 --> 00:10:18,120 underwater world. 162 00:10:28,800 --> 00:10:33,120 Unlike [music] most fish that rely on 163 00:10:30,640 --> 00:10:35,440 speed or sharp teeth alone, the 164 00:10:33,120 --> 00:10:38,240 stargazer [music] possesses a unique 165 00:10:35,440 --> 00:10:40,480 defensive system. 166 00:10:38,240 --> 00:10:42,160 Hidden behind its gills are venomous 167 00:10:40,480 --> 00:10:44,000 spines [music] capable of delivering a 168 00:10:42,160 --> 00:10:46,800 painful sting when the animal is 169 00:10:44,000 --> 00:10:48,959 disturbed. These spines [music] act as a 170 00:10:46,800 --> 00:10:51,200 powerful defense mechanism against 171 00:10:48,959 --> 00:10:55,320 predators that might attempt to attack 172 00:10:51,200 --> 00:10:55,320 or swallow the fish. 173 00:11:11,600 --> 00:11:18,160 In its [music] daily life, the stargazer 174 00:11:14,320 --> 00:11:20,480 is a master of ambush. It buries itself 175 00:11:18,160 --> 00:11:22,320 beneath the sand [music] with remarkable 176 00:11:20,480 --> 00:11:25,440 precision, leaving only its 177 00:11:22,320 --> 00:11:27,102 upward-facing eyes exposed. When an 178 00:11:25,440 --> 00:11:27,920 unsuspecting fish swims overhead, 179 00:11:27,102 --> 00:11:30,320 [music] 180 00:11:27,920 --> 00:11:33,279 the stargazer launches upward in a 181 00:11:30,320 --> 00:11:36,760 sudden burst, capturing its prey in a 182 00:11:33,279 --> 00:11:36,760 split second 183 00:11:52,720 --> 00:11:55,040 in parts of the tropical Atlantic. 184 00:11:54,613 --> 00:11:58,320 >> [music] 185 00:11:55,040 --> 00:11:59,839 >> where some stargazer species live. The 186 00:11:58,320 --> 00:12:03,279 ocean hides [music] one of the most 187 00:11:59,839 --> 00:12:05,748 famous marine ecosystems on the planet. 188 00:12:03,279 --> 00:12:09,040 The Mesoamerican barrier reef stretching 189 00:12:05,748 --> 00:12:12,639 [music] along the coasts of Mexico, Biz, 190 00:12:09,040 --> 00:12:15,920 Guatemala, and Honduras forms the second 191 00:12:12,639 --> 00:12:18,000 largest coral reef system in the world. 192 00:12:15,920 --> 00:12:21,200 Beneath these vibrant [music] reefs and 193 00:12:18,000 --> 00:12:24,320 sandy seafloors, strange predators like 194 00:12:21,200 --> 00:12:27,320 the stargazer quietly wait beneath the 195 00:12:24,320 --> 00:12:27,320 sand. 196 00:12:48,000 --> 00:12:53,120 For humans, [music] encounters with this 197 00:12:50,560 --> 00:12:55,279 fish are uncommon, but can happen when 198 00:12:53,120 --> 00:12:58,079 fishermen or divers accidentally [music] 199 00:12:55,279 --> 00:13:01,040 handle one. The venomous spines can 200 00:12:58,079 --> 00:13:03,760 cause intense pain, swelling, and 201 00:13:01,040 --> 00:13:05,680 discomfort if touched. Yet, the 202 00:13:03,760 --> 00:13:08,800 stargazer is not an aggressive [music] 203 00:13:05,680 --> 00:13:11,360 animal. It simply defends itself when 204 00:13:08,800 --> 00:13:13,040 disturbed. Another reminder that even 205 00:13:11,360 --> 00:13:16,320 the most hidden [music] creatures of the 206 00:13:13,040 --> 00:13:19,320 ocean carry remarkable adaptations for 207 00:13:16,320 --> 00:13:19,320 survival. 208 00:13:54,320 --> 00:13:57,600 Across the deserts of the southwestern 209 00:13:55,789 --> 00:14:00,079 [music] United States and northern 210 00:13:57,600 --> 00:14:04,160 Mexico, a small but highly adapted 211 00:14:00,079 --> 00:14:06,399 predator emerges after sunset. 212 00:14:04,160 --> 00:14:08,320 The Arizona bark scorpion [music] spends 213 00:14:06,399 --> 00:14:11,120 the hottest hours of the day hidden 214 00:14:08,320 --> 00:14:13,440 beneath rocks, inside tree [music] bark, 215 00:14:11,120 --> 00:14:16,480 or in narrow crevices where the desert 216 00:14:13,440 --> 00:14:19,600 sun cannot reach. But when [music] night 217 00:14:16,480 --> 00:14:22,644 falls and the temperature cools, it 218 00:14:19,600 --> 00:14:23,199 begins its quiet hunt across the desert 219 00:14:22,644 --> 00:14:26,199 [music] 220 00:14:23,199 --> 00:14:26,199 landscape. 221 00:14:32,399 --> 00:14:37,760 This species carries [music] a powerful 222 00:14:34,880 --> 00:14:41,279 neurotoxic venom delivered through the 223 00:14:37,760 --> 00:14:43,199 curved stinger at the end of its tail. 224 00:14:41,279 --> 00:14:46,240 The toxin [music] affects the nervous 225 00:14:43,199 --> 00:14:49,760 system of its prey, quickly overwhelming 226 00:14:46,240 --> 00:14:52,560 insects and other small arropods. 227 00:14:49,760 --> 00:14:54,880 For the scorpion, this venom is an 228 00:14:52,560 --> 00:14:57,760 essential tool that allows it to survive 229 00:14:54,880 --> 00:15:00,760 in an environment where food can be 230 00:14:57,760 --> 00:15:00,760 scarce. 231 00:15:17,040 --> 00:15:21,920 In its nightly [music] routine, the 232 00:15:19,199 --> 00:15:25,199 Arizona bark scorpion moves carefully 233 00:15:21,920 --> 00:15:28,145 across [music] rocks, sand, and desert 234 00:15:25,199 --> 00:15:29,199 vegetation. 235 00:15:28,145 --> 00:15:31,519 >> [music] 236 00:15:29,199 --> 00:15:33,760 >> Unlike many scorpions, it is also 237 00:15:31,519 --> 00:15:37,040 capable of climbing vertical surfaces 238 00:15:33,760 --> 00:15:40,240 such as tree bark, walls, and rocky 239 00:15:37,040 --> 00:15:42,240 formations. Its sensitive hairs detect 240 00:15:40,240 --> 00:15:45,120 vibrations in [music] the ground and 241 00:15:42,240 --> 00:15:49,639 air, allowing it to sense the movement 242 00:15:45,120 --> 00:15:49,639 of prey in the darkness. 243 00:16:04,000 --> 00:16:08,639 In the same desert regions where this 244 00:16:06,136 --> 00:16:10,721 [music] scorpion lives, one of the most 245 00:16:08,639 --> 00:16:13,040 breathtaking natural landmarks in 246 00:16:10,721 --> 00:16:15,519 [music] North America cuts through the 247 00:16:13,040 --> 00:16:18,399 arid landscape. The Grand [music] 248 00:16:15,519 --> 00:16:20,800 Canyon, carved by the Colorado River 249 00:16:18,399 --> 00:16:24,399 over millions of years, reveals [music] 250 00:16:20,800 --> 00:16:26,560 immense cliffs, layered rock walls, and 251 00:16:24,399 --> 00:16:29,199 one of the most extraordinary geological 252 00:16:26,560 --> 00:16:30,959 wonders on Earth. 253 00:16:29,199 --> 00:16:34,560 Among these vast [music] desert 254 00:16:30,959 --> 00:16:37,680 expanses, rocky shadows, and silent 255 00:16:34,560 --> 00:16:39,920 crevices, the Arizona bark scorpion 256 00:16:37,680 --> 00:16:42,920 continues its hidden life after [music] 257 00:16:39,920 --> 00:16:42,920 sunset. 258 00:16:50,021 --> 00:16:52,041 >> [music] 259 00:17:06,559 --> 00:17:10,400 >> For humans, this scorpion [music] is 260 00:17:08,880 --> 00:17:12,720 considered one of the most venomous 261 00:17:10,400 --> 00:17:15,839 species in North America. 262 00:17:12,720 --> 00:17:19,280 A sting can cause intense pain, 263 00:17:15,839 --> 00:17:22,160 numbness, muscle spasms, and severe 264 00:17:19,280 --> 00:17:24,799 discomfort, especially in children or 265 00:17:22,160 --> 00:17:27,199 sensitive individuals. Even so, [music] 266 00:17:24,799 --> 00:17:29,977 the scorpion does not attack without 267 00:17:27,199 --> 00:17:32,400 reason. It simply defends itself when 268 00:17:29,977 --> 00:17:34,880 [music] threatened. Another example of 269 00:17:32,400 --> 00:17:39,799 how even the smallest desert creatures 270 00:17:34,880 --> 00:17:39,799 possess powerful survival tools. 271 00:18:05,347 --> 00:18:07,367 >> [music] 272 00:18:20,320 --> 00:18:23,760 >> Across the deserts of the southwestern 273 00:18:21,722 --> 00:18:26,240 [music] United States and northern 274 00:18:23,760 --> 00:18:29,360 Mexico, a heavy-bodied lizard moves 275 00:18:26,240 --> 00:18:32,400 slowly between rocks, cactus shadows, 276 00:18:29,360 --> 00:18:34,480 and dry desert soil. 277 00:18:32,400 --> 00:18:36,559 The Gila monster is one of the few 278 00:18:34,480 --> 00:18:38,960 venomous [music] lizards in the world. 279 00:18:36,559 --> 00:18:41,200 Instantly recognizable by its striking 280 00:18:38,960 --> 00:18:46,760 black and orange patterns that look 281 00:18:41,200 --> 00:18:46,760 almost like beads embedded in its skin. 282 00:18:59,520 --> 00:19:04,559 Its venom is [music] produced in glands 283 00:19:01,919 --> 00:19:06,960 located in the lower jaw and delivered 284 00:19:04,559 --> 00:19:09,360 through grooved teeth when the animal 285 00:19:06,960 --> 00:19:12,000 bites. Unlike many venomous [music] 286 00:19:09,360 --> 00:19:14,960 snakes that inject venom quickly and 287 00:19:12,000 --> 00:19:17,840 release, the gila monster often holds 288 00:19:14,960 --> 00:19:21,039 on, allowing the [music] toxin to flow 289 00:19:17,840 --> 00:19:23,948 into the wound. The venom can cause 290 00:19:21,039 --> 00:19:26,559 intense pain, swelling, and strong 291 00:19:23,948 --> 00:19:30,600 [music] physiological reactions designed 292 00:19:26,559 --> 00:19:30,600 to discourage predators. 293 00:19:37,048 --> 00:19:39,068 [music] 294 00:19:44,400 --> 00:19:49,840 Despite its intimidating reputation, the 295 00:19:47,360 --> 00:19:51,520 Gila monster is actually a slowmoving 296 00:19:49,840 --> 00:19:54,000 and mostly secretive [music] 297 00:19:51,520 --> 00:19:56,080 animal. It spends much of its life 298 00:19:54,000 --> 00:19:58,720 hidden in underground burrows [music] or 299 00:19:56,080 --> 00:20:02,000 beneath rocks to escape the extreme 300 00:19:58,720 --> 00:20:05,679 desert heat. It feeds [music] on eggs, 301 00:20:02,000 --> 00:20:08,080 small mammals, birds, and reptiles, 302 00:20:05,679 --> 00:20:11,108 using [music] a powerful sense of smell 303 00:20:08,080 --> 00:20:14,120 to locate food in the harsh desert 304 00:20:11,108 --> 00:20:14,120 [music] environment. 305 00:20:15,200 --> 00:20:19,760 In the regions where this reptile 306 00:20:17,003 --> 00:20:21,520 [music] lives, the desert landscape 307 00:20:19,760 --> 00:20:25,200 reveals one of the most iconic 308 00:20:21,520 --> 00:20:26,080 ecosystems of North America. The Sonoran 309 00:20:25,200 --> 00:20:28,400 Desert [music] 310 00:20:26,080 --> 00:20:31,440 stretching across parts of Arizona and 311 00:20:28,400 --> 00:20:34,880 Mexico is famous for its towering 312 00:20:31,440 --> 00:20:37,679 saguaro cacti that can reach heights of 313 00:20:34,880 --> 00:20:39,039 over 40 ft. Among these giant 314 00:20:37,679 --> 00:20:41,520 silhouettes rising [music] from the 315 00:20:39,039 --> 00:20:44,159 desert floor, the Gila monster quietly 316 00:20:41,520 --> 00:20:47,189 moves between rocks and sand beneath the 317 00:20:44,159 --> 00:20:47,189 scorching sun. [music] 318 00:20:51,064 --> 00:20:53,084 >> [music] 319 00:21:02,799 --> 00:21:08,640 >> For humans, encounters with this lizard 320 00:21:05,760 --> 00:21:10,000 are extremely rare. A bite can be 321 00:21:08,640 --> 00:21:12,080 painful [music] and medically 322 00:21:10,000 --> 00:21:15,200 significant, but the animal is not 323 00:21:12,080 --> 00:21:17,600 aggressive and usually tries to retreat 324 00:21:15,200 --> 00:21:20,799 when approached. Like [music] many 325 00:21:17,600 --> 00:21:23,919 venomous creatures in nature, the Gila 326 00:21:20,799 --> 00:21:26,799 monster uses its venom primarily as a 327 00:21:23,919 --> 00:21:29,360 defense. Another reminder that even the 328 00:21:26,799 --> 00:21:34,200 quiet deserts hold remarkable [music] 329 00:21:29,360 --> 00:21:34,200 and powerful forms of life. 330 00:21:40,844 --> 00:21:42,864 [music] 331 00:21:46,880 --> 00:21:53,200 In quiet corners of houses, storage 332 00:21:50,080 --> 00:21:55,360 rooms, barns, and undisturbed spaces 333 00:21:53,200 --> 00:21:58,240 across parts of the United States and 334 00:21:55,360 --> 00:22:01,120 the Americas, a small spider lives 335 00:21:58,240 --> 00:22:04,799 mostly unnoticed. 336 00:22:01,120 --> 00:22:07,679 The brown recluse is a shy and reclusive 337 00:22:04,799 --> 00:22:10,320 arachnid that prefers dark sheltered 338 00:22:07,679 --> 00:22:13,520 places where it can remain hidden during 339 00:22:10,320 --> 00:22:15,919 the day. Its light brown color and long 340 00:22:13,520 --> 00:22:18,400 slender legs help it blend easily into 341 00:22:15,919 --> 00:22:22,840 its surroundings, which is why many 342 00:22:18,400 --> 00:22:22,840 people never realize it is nearby. 343 00:22:28,320 --> 00:22:32,159 The venom of the brown [music] recluse 344 00:22:30,240 --> 00:22:35,120 is well known for its necrotic 345 00:22:32,159 --> 00:22:37,760 properties. When a bite occurs, the 346 00:22:35,120 --> 00:22:40,559 toxin can damage [music] skin cells and 347 00:22:37,760 --> 00:22:43,919 surrounding tissue, sometimes leading to 348 00:22:40,559 --> 00:22:46,480 lesions that develop slowly over time. 349 00:22:43,919 --> 00:22:48,880 The venom interferes with cell membranes 350 00:22:46,480 --> 00:22:51,120 and triggers inflammation, 351 00:22:48,880 --> 00:22:53,360 making this spider one of the few in the 352 00:22:51,120 --> 00:22:56,840 world capable of causing significant 353 00:22:53,360 --> 00:22:56,840 skin necrosis. 354 00:23:01,679 --> 00:23:07,919 In its natural behavior, the brown 355 00:23:04,320 --> 00:23:10,400 recluse avoids confrontation whenever 356 00:23:07,919 --> 00:23:13,760 possible. It spends most of its life 357 00:23:10,400 --> 00:23:16,880 hidden inside cracks, behind furniture, 358 00:23:13,760 --> 00:23:19,440 under stored boxes, or inside clothing 359 00:23:16,880 --> 00:23:21,919 that has [music] been left undisturbed. 360 00:23:19,440 --> 00:23:23,760 It feeds mainly on insects and other 361 00:23:21,919 --> 00:23:26,000 small arropods, [music] 362 00:23:23,760 --> 00:23:29,480 quietly playing its role in controlling 363 00:23:26,000 --> 00:23:29,480 pest populations. 364 00:23:34,640 --> 00:23:40,400 For humans, most encounters with this 365 00:23:37,280 --> 00:23:42,640 spider happen accidentally. A bite may 366 00:23:40,400 --> 00:23:46,640 occur when someone puts on clothing or 367 00:23:42,640 --> 00:23:49,039 shoes where the spider was hiding. 368 00:23:46,640 --> 00:23:51,840 In many cases, the bite goes unnoticed 369 00:23:49,039 --> 00:23:52,400 at first, but hours later, pain, 370 00:23:51,840 --> 00:23:56,880 redness, [music] 371 00:23:52,400 --> 00:24:00,400 and tissue damage can begin to develop. 372 00:23:56,880 --> 00:24:01,919 Even so, the brown recluse does not seek 373 00:24:00,400 --> 00:24:03,919 confrontation. 374 00:24:01,919 --> 00:24:07,880 It simply reacts [music] when it feels 375 00:24:03,919 --> 00:24:07,880 trapped or threatened. 376 00:24:35,840 --> 00:24:41,200 Across deserts, [music] grasslands, and 377 00:24:38,640 --> 00:24:43,679 rocky landscapes of North and South 378 00:24:41,200 --> 00:24:46,320 America, a snake known for its 379 00:24:43,679 --> 00:24:49,039 unmistakable warning, sound moves 380 00:24:46,320 --> 00:24:51,279 quietly [music] through the wild. The 381 00:24:49,039 --> 00:24:53,360 rattlesnake is one of the most 382 00:24:51,279 --> 00:24:56,080 recognizable venomous snakes [music] in 383 00:24:53,360 --> 00:24:59,120 the world. Famous for the rattle at the 384 00:24:56,080 --> 00:25:02,000 end of its tail, a natural alarm system 385 00:24:59,120 --> 00:25:05,480 that warns intruders before a strike 386 00:25:02,000 --> 00:25:05,480 ever happens. 387 00:25:12,000 --> 00:25:17,840 Its venom is a complex mixture of 388 00:25:14,559 --> 00:25:20,720 powerful toxins. In many species, the 389 00:25:17,840 --> 00:25:22,640 venom is primarily hemotoxic, 390 00:25:20,720 --> 00:25:25,360 meaning it damages tissues and 391 00:25:22,640 --> 00:25:28,000 interferes with blood clotting. When the 392 00:25:25,360 --> 00:25:30,320 snake strikes, it delivers venom through 393 00:25:28,000 --> 00:25:32,880 long, hollow fangs designed to 394 00:25:30,320 --> 00:25:35,880 immobilize prey [music] quickly and 395 00:25:32,880 --> 00:25:35,880 efficiently. 396 00:25:39,922 --> 00:25:41,942 >> [music] 397 00:25:58,559 --> 00:26:02,559 >> In its [music] daily behavior, the 398 00:26:00,320 --> 00:26:04,880 rattlesnake is a patient ambush 399 00:26:02,559 --> 00:26:07,440 predator. It relies [music] heavily on 400 00:26:04,880 --> 00:26:11,279 camouflage, blending almost perfectly 401 00:26:07,440 --> 00:26:14,080 with rocks, sand, and dry vegetation. 402 00:26:11,279 --> 00:26:16,799 Special heat sensing pits located 403 00:26:14,080 --> 00:26:18,799 between the eyes and nostrils allow it 404 00:26:16,799 --> 00:26:23,240 to detect the body heat of nearby 405 00:26:18,799 --> 00:26:23,240 animals, even in darkness. 406 00:26:34,000 --> 00:26:38,320 In [music] parts of the American 407 00:26:35,440 --> 00:26:40,240 Southwest where rattlesnakes live, 408 00:26:38,320 --> 00:26:42,480 nature [music] reveals one of the most 409 00:26:40,240 --> 00:26:44,000 iconic desert landscapes in North 410 00:26:42,480 --> 00:26:46,320 America. 411 00:26:44,000 --> 00:26:49,440 Monument Valley, located along [music] 412 00:26:46,320 --> 00:26:51,840 the border of Arizona and Utah, is 413 00:26:49,440 --> 00:26:54,480 famous for its towering sandstone 414 00:26:51,840 --> 00:26:57,520 beautes rising [music] dramatically from 415 00:26:54,480 --> 00:27:00,488 the desert floor. Shaped by millions of 416 00:26:57,520 --> 00:27:03,120 years of wind and erosion, these massive 417 00:27:00,488 --> 00:27:05,360 [music] rock formations stand like 418 00:27:03,120 --> 00:27:08,840 ancient monuments beneath the [music] 419 00:27:05,360 --> 00:27:08,840 open sky. 420 00:27:10,968 --> 00:27:12,988 [music] 421 00:27:21,279 --> 00:27:25,440 For humans, [music] the sound of the 422 00:27:23,200 --> 00:27:28,000 rattle is often the first and most 423 00:27:25,440 --> 00:27:30,880 important warning. It gives anyone 424 00:27:28,000 --> 00:27:32,720 nearby a chance to step back before the 425 00:27:30,880 --> 00:27:37,039 snake feels [music] forced to defend 426 00:27:32,720 --> 00:27:39,679 itself. A bite can cause severe pain, 427 00:27:37,039 --> 00:27:43,039 swelling, [music] and tissue damage if 428 00:27:39,679 --> 00:27:44,240 untreated. Yet, the rattlesnake rarely 429 00:27:43,039 --> 00:27:47,840 attacks without [music] 430 00:27:44,240 --> 00:27:53,799 reason. Its famous rattle exists 431 00:27:47,840 --> 00:27:53,799 precisely to avoid unnecessary conflict. 432 00:27:55,509 --> 00:27:57,529 [music] 433 00:28:02,720 --> 00:28:05,720 Yeah, 434 00:28:09,120 --> 00:28:12,120 hey, 435 00:28:26,240 --> 00:28:31,279 Deep within the tropical forests of 436 00:28:28,159 --> 00:28:34,640 South America, a small caterpillar rests 437 00:28:31,279 --> 00:28:35,919 quietly along the bark of trees. At 438 00:28:34,640 --> 00:28:38,320 first [music] glance, it appears 439 00:28:35,919 --> 00:28:41,039 harmless, blending perfectly with the 440 00:28:38,320 --> 00:28:43,760 texture of the trunk where it hides. 441 00:28:41,039 --> 00:28:45,919 This is the Lenomia caterpillar, one of 442 00:28:43,760 --> 00:28:49,440 the most dangerous caterpillars in the 443 00:28:45,919 --> 00:28:54,600 world, despite its small size and almost 444 00:28:49,440 --> 00:28:54,600 invisible presence in the forest. 445 00:29:07,440 --> 00:29:12,399 The danger of this creature lies in the 446 00:29:10,080 --> 00:29:15,520 fine [music] venomous spines that cover 447 00:29:12,399 --> 00:29:18,320 its body. When touched, [music] these 448 00:29:15,520 --> 00:29:19,760 spines release a powerful toxin capable 449 00:29:18,320 --> 00:29:21,919 of interfering with the [music] human 450 00:29:19,760 --> 00:29:23,679 body's ability to control blood 451 00:29:21,919 --> 00:29:26,159 clotting. 452 00:29:23,679 --> 00:29:28,080 Unlike many venoms that cause immediate 453 00:29:26,159 --> 00:29:30,880 paralysis [music] or intense burning 454 00:29:28,080 --> 00:29:33,105 pain, the venom of lenomia acts in a 455 00:29:30,880 --> 00:29:35,125 different and far more insidious way. 456 00:29:33,105 --> 00:29:35,125 [music] 457 00:29:43,520 --> 00:29:48,799 In its natural behavior, the lenomia 458 00:29:46,399 --> 00:29:50,640 caterpillar often remains in groups 459 00:29:48,799 --> 00:29:53,200 along [music] tree trunks during the 460 00:29:50,640 --> 00:29:56,000 day. Their camouflage makes them look 461 00:29:53,200 --> 00:29:57,919 like part of the bark itself, allowing 462 00:29:56,000 --> 00:30:00,960 them [music] to remain almost invisible 463 00:29:57,919 --> 00:30:03,679 to predators. They move slowly across 464 00:30:00,960 --> 00:30:05,039 leaves at night, feeding quietly on 465 00:30:03,679 --> 00:30:08,039 vegetation in the [music] dense 466 00:30:05,039 --> 00:30:08,039 rainforest. 467 00:30:21,360 --> 00:30:26,640 In regions where this species lives, the 468 00:30:24,640 --> 00:30:29,520 landscape reveals one of the most 469 00:30:26,640 --> 00:30:32,880 spectacular natural landmarks [music] in 470 00:30:29,520 --> 00:30:35,279 South America. The magnificent Iguasu 471 00:30:32,880 --> 00:30:38,320 Falls located along the border between 472 00:30:35,279 --> 00:30:41,840 Brazil and Argentina form a massive 473 00:30:38,320 --> 00:30:45,039 system of waterfalls surrounded by lush 474 00:30:41,840 --> 00:30:47,279 subtropical forest. Amid the constant 475 00:30:45,039 --> 00:30:50,080 mist rising from [music] the powerful 476 00:30:47,279 --> 00:30:52,399 cascades and the vibrant life of the 477 00:30:50,080 --> 00:30:54,799 surrounding jungle, the Lenomia 478 00:30:52,399 --> 00:30:58,360 caterpillar [music] quietly survives 479 00:30:54,799 --> 00:30:58,360 among the trees. 480 00:31:13,919 --> 00:31:17,360 For humans, [music] 481 00:31:15,279 --> 00:31:19,840 accidental contact with this caterpillar 482 00:31:17,360 --> 00:31:22,240 can be extremely dangerous. The venom 483 00:31:19,840 --> 00:31:24,559 may cause severe bleeding disorders, 484 00:31:22,240 --> 00:31:28,000 internal hemorrhaging, and serious 485 00:31:24,559 --> 00:31:31,200 medical complications if untreated. Yet 486 00:31:28,000 --> 00:31:34,240 the Lenomia does not attack or pursue 487 00:31:31,200 --> 00:31:36,880 anyone. Like many venomous animals, its 488 00:31:34,240 --> 00:31:41,320 toxin [music] exists only as a defense 489 00:31:36,880 --> 00:31:41,320 against those who might threaten it. 490 00:31:46,726 --> 00:31:49,401 [music] 491 00:31:47,381 --> 00:31:49,401 [bell] 492 00:32:04,960 --> 00:32:11,200 In the dense tropical forests of Central 493 00:32:07,600 --> 00:32:13,919 and South America, a powerful snake 494 00:32:11,200 --> 00:32:17,039 moves silently through layers of fallen 495 00:32:13,919 --> 00:32:19,760 leaves and tangled vegetation 496 00:32:17,039 --> 00:32:21,440 known as the fair dilance and commonly 497 00:32:19,760 --> 00:32:23,600 called jaraka [music] 498 00:32:21,440 --> 00:32:25,519 in parts of South America. 499 00:32:23,600 --> 00:32:28,559 This snake is considered one of the most 500 00:32:25,519 --> 00:32:30,799 dangerous vipers in the Americas. Its 501 00:32:28,559 --> 00:32:33,360 patterned [music] scales blend perfectly 502 00:32:30,799 --> 00:32:35,360 with the forest floor, making it [music] 503 00:32:33,360 --> 00:32:38,360 almost invisible in the shadows of the 504 00:32:35,360 --> 00:32:38,360 jungle. 505 00:32:41,440 --> 00:32:46,080 The venom of the fair dons is a complex 506 00:32:44,000 --> 00:32:49,360 mixture [music] of hemotoxic and 507 00:32:46,080 --> 00:32:52,559 proteolytic toxins. These compounds 508 00:32:49,360 --> 00:32:55,360 attack blood cells, disrupt clotting, 509 00:32:52,559 --> 00:32:59,039 and destroy surrounding [music] tissue. 510 00:32:55,360 --> 00:33:01,760 For its prey, usually rodents, birds, 511 00:32:59,039 --> 00:33:02,720 and small mammals, the venom works 512 00:33:01,760 --> 00:33:04,880 quickly, [music] 513 00:33:02,720 --> 00:33:06,880 allowing the snake to immobilize its 514 00:33:04,880 --> 00:33:09,880 target with remarkable [music] 515 00:33:06,880 --> 00:33:09,880 efficiency 516 00:33:14,240 --> 00:33:19,519 in its natural [music] behavior. The 517 00:33:16,080 --> 00:33:21,360 fair dong is a classic ambush predator. 518 00:33:19,519 --> 00:33:23,360 It often remains completely still 519 00:33:21,360 --> 00:33:26,159 beneath leaves or branches, [music] 520 00:33:23,360 --> 00:33:28,159 waiting for movement nearby. When a 521 00:33:26,159 --> 00:33:30,240 potential prey animal passes within 522 00:33:28,159 --> 00:33:33,039 range, the snake strikes [music] with 523 00:33:30,240 --> 00:33:37,480 extraordinary speed before retreating to 524 00:33:33,039 --> 00:33:37,480 allow the venom to [music] take effect. 525 00:33:50,523 --> 00:33:52,543 >> [music] 526 00:33:59,120 --> 00:34:01,840 >> In regions where this snake lives, 527 00:34:01,003 --> 00:34:04,159 [music] 528 00:34:01,840 --> 00:34:07,440 the landscape is shaped by powerful 529 00:34:04,159 --> 00:34:09,839 geological forces. In Guatemala, the 530 00:34:07,440 --> 00:34:12,399 dramatic volcan [music] fuego rises 531 00:34:09,839 --> 00:34:14,320 above the surrounding forests as one of 532 00:34:12,399 --> 00:34:17,200 the most active volcanoes in the 533 00:34:14,320 --> 00:34:20,720 Americas. Columns [music] of smoke and 534 00:34:17,200 --> 00:34:23,359 ash often rise from its summit, creating 535 00:34:20,720 --> 00:34:27,520 a striking contrast against the [music] 536 00:34:23,359 --> 00:34:30,399 lush green mountains that surround it. 537 00:34:27,520 --> 00:34:32,480 Within these rich tropical environments, 538 00:34:30,399 --> 00:34:34,720 the Ferdilance [music] continues its 539 00:34:32,480 --> 00:34:38,200 quiet life among the leaves of the 540 00:34:34,720 --> 00:34:38,200 forest floor. 541 00:34:40,304 --> 00:34:42,324 [music] 542 00:34:43,520 --> 00:34:49,280 For humans, encounters with this snake 543 00:34:46,639 --> 00:34:51,280 can be extremely dangerous, especially 544 00:34:49,280 --> 00:34:53,679 in [music] rural areas where people walk 545 00:34:51,280 --> 00:34:57,280 through forest trails or agricultural 546 00:34:53,679 --> 00:35:00,880 land. A bite can cause [music] intense 547 00:34:57,280 --> 00:35:02,960 pain, swelling, internal bleeding, and 548 00:35:00,880 --> 00:35:06,400 severe [music] tissue damage if 549 00:35:02,960 --> 00:35:08,560 untreated. Yet, the fairance does not 550 00:35:06,400 --> 00:35:10,480 seek confrontation. 551 00:35:08,560 --> 00:35:13,760 It strikes [music] only when surprised 552 00:35:10,480 --> 00:35:18,040 or threatened, relying on venom as its 553 00:35:13,760 --> 00:35:18,040 primary tool [music] of survival. 554 00:35:33,280 --> 00:35:38,240 In the warm waters of the Indian Ocean 555 00:35:35,520 --> 00:35:40,400 and parts of the western Pacific, a 556 00:35:38,240 --> 00:35:44,839 slender and elegant predator moves 557 00:35:40,400 --> 00:35:44,839 effortlessly through the sea. 558 00:35:45,599 --> 00:35:51,599 The belchure's sea snake is one of the 559 00:35:48,720 --> 00:35:54,000 most venomous snakes ever discovered. 560 00:35:51,599 --> 00:35:56,960 Yet, it spends nearly its entire life 561 00:35:54,000 --> 00:36:00,839 beneath the surface of the ocean, rarely 562 00:35:56,960 --> 00:36:00,839 seen by humans. 563 00:36:13,839 --> 00:36:19,210 Its venom is an extremely potent 564 00:36:15,760 --> 00:36:22,160 combination of neurotoxic and myiotoxic 565 00:36:19,210 --> 00:36:24,450 [music] compounds. These toxins attack 566 00:36:22,160 --> 00:36:26,960 the nervous system and muscle tissue, 567 00:36:24,450 --> 00:36:30,400 [music] quickly disabling small fish and 568 00:36:26,960 --> 00:36:32,320 marine prey. For the snake, this 569 00:36:30,400 --> 00:36:35,359 powerful venom ensures [music] that its 570 00:36:32,320 --> 00:36:39,800 prey cannot escape in the vast and open 571 00:36:35,359 --> 00:36:39,800 environment of the ocean. 572 00:37:09,040 --> 00:37:14,320 Despite its incredible venom potency, 573 00:37:12,079 --> 00:37:17,359 the belchure [music] sea snake is known 574 00:37:14,320 --> 00:37:20,160 for its calm behavior. It swims 575 00:37:17,359 --> 00:37:23,040 gracefully through coral reefs and sandy 576 00:37:20,160 --> 00:37:26,640 seabeds, hunting small [music] fish and 577 00:37:23,040 --> 00:37:29,440 eels among underwater crevices. Its 578 00:37:26,640 --> 00:37:31,359 flattened tail acts like a paddle, 579 00:37:29,440 --> 00:37:34,920 allowing it [music] to glide efficiently 580 00:37:31,359 --> 00:37:34,920 through the water. 581 00:37:51,280 --> 00:37:55,920 In [music] regions where this snake 582 00:37:53,280 --> 00:37:59,839 lives, the ocean reveals one of the most 583 00:37:55,920 --> 00:38:01,599 extraordinary ecosystems on Earth. 584 00:37:59,839 --> 00:38:04,400 Along the northeastern [music] coast of 585 00:38:01,599 --> 00:38:06,800 Australia stretches the Great Barrier 586 00:38:04,400 --> 00:38:09,040 Reef, the largest [music] coral reef 587 00:38:06,800 --> 00:38:11,520 system on the planet and one of the most 588 00:38:09,040 --> 00:38:13,440 biodiverse marine environments in 589 00:38:11,520 --> 00:38:15,920 existence. 590 00:38:13,440 --> 00:38:18,960 Among [music] vibrant coral gardens and 591 00:38:15,920 --> 00:38:21,696 countless species of marine life, the 592 00:38:18,960 --> 00:38:26,040 belchure sea snake quietly navigates 593 00:38:21,696 --> 00:38:26,040 [music] its underwater world. 594 00:38:35,440 --> 00:38:41,440 For humans, encounters with this species 595 00:38:38,640 --> 00:38:43,200 are extremely rare. Most recorded 596 00:38:41,440 --> 00:38:45,200 incidents involve fishermen who 597 00:38:43,200 --> 00:38:47,839 accidentally capture the snake in 598 00:38:45,200 --> 00:38:50,800 fishing nets. Even though its venom is 599 00:38:47,839 --> 00:38:53,680 extraordinarily potent, the snake itself 600 00:38:50,800 --> 00:38:56,079 is not aggressive and usually avoids 601 00:38:53,680 --> 00:38:58,480 confrontation. Like many venomous 602 00:38:56,079 --> 00:39:01,280 animals in nature, it relies on its 603 00:38:58,480 --> 00:39:04,839 venom primarily for hunting and survival 604 00:39:01,280 --> 00:39:04,839 in the ocean. 605 00:40:11,119 --> 00:40:17,119 In the warm coastal waters of northern 606 00:40:13,599 --> 00:40:20,079 Australia and parts of the Indo-Pacific, 607 00:40:17,119 --> 00:40:23,040 a creature so small it can fit easily in 608 00:40:20,079 --> 00:40:25,520 the palm of a hand drifts silently 609 00:40:23,040 --> 00:40:28,400 through the ocean. The Erukanji 610 00:40:25,520 --> 00:40:30,400 jellyfish is nearly transparent, making 611 00:40:28,400 --> 00:40:33,839 it extremely difficult to see in the 612 00:40:30,400 --> 00:40:35,760 water. Despite its tiny size, it is 613 00:40:33,839 --> 00:40:38,079 responsible for one of the most intense 614 00:40:35,760 --> 00:40:41,079 venom reactions known in the marine 615 00:40:38,079 --> 00:40:41,079 world. 616 00:40:45,040 --> 00:40:50,383 The venom of the erukanji is incredibly 617 00:40:47,839 --> 00:40:53,839 powerful and affects both the nervous 618 00:40:50,383 --> 00:40:55,623 [music] and cardiovascular systems. When 619 00:40:53,839 --> 00:40:58,079 its delicate tentacles make contact 620 00:40:55,623 --> 00:41:01,040 [music] with the skin, thousands of 621 00:40:58,079 --> 00:41:03,599 microscopic stinging cells fire almost 622 00:41:01,040 --> 00:41:06,839 instantly, injecting venom [music] into 623 00:41:03,599 --> 00:41:06,839 the body. 624 00:41:24,160 --> 00:41:28,720 This can trigger a reaction known 625 00:41:25,753 --> 00:41:31,839 [music] as irkanji syndrome. A condition 626 00:41:28,720 --> 00:41:35,680 that causes severe pain, intense [music] 627 00:41:31,839 --> 00:41:37,839 anxiety, muscle cramps, nausea, and 628 00:41:35,680 --> 00:41:40,839 dramatic increases in blood [music] 629 00:41:37,839 --> 00:41:40,839 pressure. 630 00:41:47,368 --> 00:41:49,388 [music] 631 00:41:51,760 --> 00:41:56,560 In its natural behavior, the Irukanji 632 00:41:54,720 --> 00:41:58,640 jellyfish drifts with [music] ocean 633 00:41:56,560 --> 00:42:01,280 currents near the surface of tropical 634 00:41:58,640 --> 00:42:03,920 waters. Unlike fast [music] swimming 635 00:42:01,280 --> 00:42:06,400 predators, it depends largely on the 636 00:42:03,920 --> 00:42:08,960 movement of the sea to encounter tiny 637 00:42:06,400 --> 00:42:11,920 marine organisms that [music] become its 638 00:42:08,960 --> 00:42:14,319 prey. Its transparent body makes it 639 00:42:11,920 --> 00:42:15,839 almost invisible in the water, [music] 640 00:42:14,319 --> 00:42:20,359 providing an effective form of 641 00:42:15,839 --> 00:42:20,359 camouflage in the open ocean. 642 00:42:34,319 --> 00:42:38,720 For [music] humans, the danger of this 643 00:42:36,560 --> 00:42:40,319 jellyfish comes from its near 644 00:42:38,720 --> 00:42:41,760 invisibility. 645 00:42:40,319 --> 00:42:44,880 Swimmers may never see [music] it before 646 00:42:41,760 --> 00:42:47,359 contact occurs. A sting can trigger 647 00:42:44,880 --> 00:42:48,939 intense symptoms within minutes and 648 00:42:47,359 --> 00:42:49,839 requires immediate medical attention. 649 00:42:48,939 --> 00:42:52,079 [music] 650 00:42:49,839 --> 00:42:55,280 Yet, the Irukanji does not attack 651 00:42:52,079 --> 00:42:56,960 deliberately. It simply exists within 652 00:42:55,280 --> 00:42:59,680 the [music] delicate balance of the 653 00:42:56,960 --> 00:43:02,400 ocean. Another reminder that some of the 654 00:42:59,680 --> 00:43:07,400 most powerful creatures in nature are 655 00:43:02,400 --> 00:43:07,400 also the [music] hardest to see. 656 00:43:42,880 --> 00:43:48,800 Drifting across the surface of tropical 657 00:43:45,040 --> 00:43:53,599 and subtropical oceans, a tiny creature 658 00:43:48,800 --> 00:43:53,599 floats silently with the currents. 659 00:43:55,760 --> 00:44:01,119 The blue sea dragon, also known as 660 00:43:58,240 --> 00:44:03,839 Glaucus Atlanticus, is a small marine 661 00:44:01,119 --> 00:44:06,880 mollisk that rarely grows longer than a 662 00:44:03,839 --> 00:44:09,200 few cm. With its brilliant blue and 663 00:44:06,880 --> 00:44:11,760 silver colors and delicate wing-like 664 00:44:09,200 --> 00:44:16,760 appendages, it almost looks like a 665 00:44:11,760 --> 00:44:16,760 living sculpture carried by the waves. 666 00:44:37,839 --> 00:44:43,200 Despite its [music] fragile appearance, 667 00:44:40,319 --> 00:44:45,760 the blue sea dragon carries a remarkable 668 00:44:43,200 --> 00:44:48,720 defense. Unlike [music] many venomous 669 00:44:45,760 --> 00:44:51,425 animals, it does not produce its own 670 00:44:48,720 --> 00:44:53,440 venom. Instead, it feeds on highly 671 00:44:51,425 --> 00:44:56,319 [music] venomous organisms such as the 672 00:44:53,440 --> 00:44:57,839 Portuguese man of war and stores their 673 00:44:56,319 --> 00:45:01,200 stinging [music] cells within 674 00:44:57,839 --> 00:45:04,160 specialized tissues in its body. These 675 00:45:01,200 --> 00:45:06,400 stolen cells remain active and can be 676 00:45:04,160 --> 00:45:09,400 used by [music] the animal as a powerful 677 00:45:06,400 --> 00:45:09,400 weapon. 678 00:45:17,626 --> 00:45:19,646 >> [music] 679 00:45:26,560 --> 00:45:31,920 >> for humans. Encounters [music] with this 680 00:45:29,040 --> 00:45:33,680 animal are rare but memorable. Even 681 00:45:31,920 --> 00:45:36,560 though it is small and visually 682 00:45:33,680 --> 00:45:38,480 stunning, touching a blue sea dragon can 683 00:45:36,560 --> 00:45:41,520 cause an extremely [music] painful 684 00:45:38,480 --> 00:45:44,400 sting. Because it concentrates the venom 685 00:45:41,520 --> 00:45:46,880 taken from its prey, its sting can 686 00:45:44,400 --> 00:45:50,079 sometimes be even more powerful than the 687 00:45:46,880 --> 00:45:52,560 organisms it [music] feeds on. It is a 688 00:45:50,079 --> 00:45:55,119 striking reminder that in the ocean, 689 00:45:52,560 --> 00:45:59,640 beauty [music] and danger often exist 690 00:45:55,119 --> 00:45:59,640 within the same delicate form. 691 00:46:31,280 --> 00:46:35,760 in the warm coastal waters of the 692 00:46:33,359 --> 00:46:38,720 western Pacific, particularly around 693 00:46:35,760 --> 00:46:41,200 Japan and parts of Southeast Asia. A 694 00:46:38,720 --> 00:46:44,079 nearly invisible predator drifts 695 00:46:41,200 --> 00:46:46,720 silently through the sea. 696 00:46:44,079 --> 00:46:50,240 Chaireex Yamaguchi belongs to the group 697 00:46:46,720 --> 00:46:52,240 known as box jellyfish. Creatures famous 698 00:46:50,240 --> 00:46:54,960 for possessing some of the most powerful 699 00:46:52,240 --> 00:46:56,960 venoms in the marine world. Its 700 00:46:54,960 --> 00:46:59,599 transparent body makes it extremely 701 00:46:56,960 --> 00:47:03,839 difficult to detect in the water until 702 00:46:59,599 --> 00:47:03,839 it is already very close. 703 00:47:14,872 --> 00:47:16,892 >> [music] 704 00:47:21,920 --> 00:47:26,720 >> The venom of this jellyfish [music] is 705 00:47:23,839 --> 00:47:29,599 extremely potent and acts rapidly on the 706 00:47:26,720 --> 00:47:32,160 nervous system and heart. Along its 707 00:47:29,599 --> 00:47:35,920 tentacles are thousands of microscopic 708 00:47:32,160 --> 00:47:38,160 stinging cells called nimatysts. 709 00:47:35,920 --> 00:47:40,240 When triggered by the slightest contact, 710 00:47:38,160 --> 00:47:42,560 these [music] cells fire tiny venomous 711 00:47:40,240 --> 00:47:45,003 harpoons into the skin, delivering 712 00:47:42,560 --> 00:47:47,200 toxins capable of causing intense pain 713 00:47:45,003 --> 00:47:50,200 [music] and serious physiological 714 00:47:47,200 --> 00:47:50,200 reactions. 715 00:47:59,413 --> 00:48:01,433 [music] 716 00:48:04,560 --> 00:48:09,280 In its natural [music] behavior, this 717 00:48:06,880 --> 00:48:11,599 jellyfish moves slowly through shallow 718 00:48:09,280 --> 00:48:14,960 coastal waters [music] where small fish 719 00:48:11,599 --> 00:48:16,960 and marine organisms are abundant. Its 720 00:48:14,960 --> 00:48:19,040 long [music] tentacles trail behind it 721 00:48:16,960 --> 00:48:21,599 in the current, forming a nearly 722 00:48:19,040 --> 00:48:24,480 invisible web in the [music] ocean. Like 723 00:48:21,599 --> 00:48:26,480 many jellyfish, it relies largely on 724 00:48:24,480 --> 00:48:29,440 drifting movements and subtle 725 00:48:26,480 --> 00:48:32,760 contractions of its bell to move through 726 00:48:29,440 --> 00:48:32,760 the water. 727 00:48:49,119 --> 00:48:54,079 For humans, encounters with this 728 00:48:51,520 --> 00:48:57,359 jellyfish are rare, but can be extremely 729 00:48:54,079 --> 00:49:00,400 painful if they occur. A sting may cause 730 00:48:57,359 --> 00:49:02,480 intense burning sensations, swelling, 731 00:49:00,400 --> 00:49:04,160 and severe discomfort [music] depending 732 00:49:02,480 --> 00:49:08,079 on the amount of contact with the 733 00:49:04,160 --> 00:49:10,400 tentacles. Like most jellyfish, it does 734 00:49:08,079 --> 00:49:12,640 not [music] attack intentionally. 735 00:49:10,400 --> 00:49:14,800 It simply reacts when something touches 736 00:49:12,640 --> 00:49:19,400 its drifting tentacles in the [music] 737 00:49:14,800 --> 00:49:19,400 vast environment of the sea. 738 00:49:33,079 --> 00:49:35,099 >> [music] 739 00:50:18,400 --> 00:50:23,040 >> Throughout this [music] journey, we 740 00:50:20,319 --> 00:50:25,479 traveled across dense rainforests, 741 00:50:23,040 --> 00:50:26,319 silent deserts, towering mountains, 742 00:50:25,479 --> 00:50:30,640 [music] 743 00:50:26,319 --> 00:50:32,160 and the vast oceans of our planet. 744 00:50:30,640 --> 00:50:34,319 Along the way, we [music] encountered 745 00:50:32,160 --> 00:50:37,119 creatures that carry one of evolution's 746 00:50:34,319 --> 00:50:40,160 most extraordinary weapons, 747 00:50:37,119 --> 00:50:42,510 venom. Each of these animals is not a 748 00:50:40,160 --> 00:50:45,200 villain of nature, but a product of 749 00:50:42,510 --> 00:50:47,200 [music] millions of years of adaptation, 750 00:50:45,200 --> 00:50:51,160 shaped by the constant struggle to 751 00:50:47,200 --> 00:50:51,160 survive in the wild. 752 00:50:56,559 --> 00:51:01,920 What may [music] seem frightening at 753 00:50:58,319 --> 00:51:03,680 first often reveals something deeper. 754 00:51:01,920 --> 00:51:06,720 The same [music] environments that hold 755 00:51:03,680 --> 00:51:09,920 incredible beauty, coral reefs bursting 756 00:51:06,720 --> 00:51:12,000 with life, endless forests, and ancient 757 00:51:09,920 --> 00:51:14,160 deserts, [music] are also home to 758 00:51:12,000 --> 00:51:17,119 creatures capable of astonishing 759 00:51:14,160 --> 00:51:20,480 biological power. Venom, [music] in the 760 00:51:17,119 --> 00:51:22,960 end, is not cruelty. It is simply 761 00:51:20,480 --> 00:51:25,599 another language of nature, a strategy 762 00:51:22,960 --> 00:51:27,760 that allows life to persist in some of 763 00:51:25,599 --> 00:51:31,079 the [music] most competitive ecosystems 764 00:51:27,760 --> 00:51:31,079 on Earth. 765 00:51:40,150 --> 00:51:42,170 >> [music] 766 00:51:42,480 --> 00:51:47,440 >> And now we want to hear from you. Which 767 00:51:44,800 --> 00:51:48,640 of these animals surprised you the most? 768 00:51:47,440 --> 00:51:52,160 Let us know in [music] the comments 769 00:51:48,640 --> 00:51:55,040 below. If you enjoyed exploring the wild 770 00:51:52,160 --> 00:51:57,280 side of nature with us, make sure to 771 00:51:55,040 --> 00:51:59,040 like the video, subscribe to the 772 00:51:57,280 --> 00:52:01,520 channel, and join us [music] for the 773 00:51:59,040 --> 00:52:05,240 next journey into the extraordinary 774 00:52:01,520 --> 00:52:05,240 world of wildlife.56591

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