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Welcome to North America.
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The most diverse
continent on Earth.
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The only place where you can find
every landscape from polar ice cap...
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00:00:33,700 --> 00:00:37,662
to baking desert, and
everything in between.
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00:00:39,998 --> 00:00:44,669
Whatever the neighborhood, there's
a hero who can make it a home.
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00:00:51,342 --> 00:00:56,681
Smart, tough,
brave, you name it.
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They all have what
it takes to thrive
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in the wildest, most
beautiful continent on Earth.
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00:01:06,858 --> 00:01:11,029
Patchwork quilt of life
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00:01:12,155 --> 00:01:17,243
Wildness never dies
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Beauty always thrives
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00:01:22,874 --> 00:01:29,214
Under these spacious skies
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The wild Northwest of America.
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00:01:50,652 --> 00:01:55,824
Majestic mountain ranges march
north for over 2,000 miles,
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00:01:56,908 --> 00:01:58,868
from Wyoming to Alaska,
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00:01:59,869 --> 00:02:03,998
and onwards into the great
wilderness of the Arctic.
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00:02:06,376 --> 00:02:08,545
This is a world of epic winters
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00:02:08,670 --> 00:02:14,634
and brief, spectacular summers,
where timing is everything.
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00:02:26,771 --> 00:02:29,149
There's a new ruler
in the Arctic.
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00:02:36,447 --> 00:02:39,075
The pack's relying on her to
find the food they'll need
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to get through the
tough months ahead.
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Their home is Ellesmere Island,
as far north as you can go.
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00:03:02,515 --> 00:03:03,892
Food is scarce.
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00:03:04,267 --> 00:03:08,438
The wolves search a territory larger
than any other wolf pack on Earth.
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Forty times the size
of Washington, D.C.
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They're in luck.
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00:03:20,867 --> 00:03:22,994
She's picked up a scent.
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00:03:31,127 --> 00:03:34,797
But this prey will test
the pack to their limit.
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Musk ox. Relics of the Ice Age.
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00:03:47,810 --> 00:03:52,649
Five foot high and 800
pounds of pure attitude.
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An adult ox could
definitely kill a wolf.
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But this herd has calves,
and with the right game plan,
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the pack could take one down.
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The howl says,
"It's time to hunt."
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00:04:29,894 --> 00:04:33,147
The alpha female goes out
front to spook the herd.
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She wants to get them running, to
tire them out and separate the young.
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She chooses the two fastest
wolves to help her push the herd
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into a 40-mile-per-hour sprint.
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She's got a calf,
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but her teammates aren't
watching her back.
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00:05:24,282 --> 00:05:27,910
The wolves' mistake gives
the musk ox time to regroup.
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A wall of horns
surround the calves.
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Shoulder to shoulder,
they're unbreakable.
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This hunt is over.
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It's a stalemate.
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A strong leader knows
when to back down.
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00:06:03,321 --> 00:06:04,906
With this opportunity lost,
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00:06:06,282 --> 00:06:10,411
it's going to be a long and
hungry winter for this wolf pack.
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00:06:18,086 --> 00:06:22,548
In Alaska, the first snow covers
the peaks of the Aleutian Range.
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00:06:33,935 --> 00:06:36,062
Where these mountains
meet the sea,
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00:06:36,562 --> 00:06:40,441
another northerner needs to pack on
the pounds before the winter comes.
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00:06:45,571 --> 00:06:46,739
A brown bear.
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00:06:48,574 --> 00:06:52,245
Survival superpower?
An iron stomach.
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The smell of this rotting whale
carcass is attracting bears
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from as far as 20 miles away.
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00:07:07,468 --> 00:07:09,554
Males are usually
bad-tempered loners.
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00:07:12,432 --> 00:07:15,810
But each bear needs up
to 60,000 calories a day
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to get fat enough to make it
through the winter hibernation.
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00:07:21,274 --> 00:07:22,984
So, they've called a truce.
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00:07:26,404 --> 00:07:29,365
It's pretty rare to see this
many together on a carcass.
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00:07:31,159 --> 00:07:35,121
Thirty tons of rotting flesh
doesn't just wash up every day.
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When bulking up, brown bears
can eat for 20 hours straight.
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00:08:04,650 --> 00:08:07,403
Oh, whoa. I think
he's overdone it.
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00:08:11,574 --> 00:08:12,992
Time for an ice bath.
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00:08:15,620 --> 00:08:16,746
Oh, man.
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00:08:20,416 --> 00:08:23,252
These guys have timed
things just right,
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00:08:24,712 --> 00:08:27,507
fattening up before the
Alaskan winter strikes.
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00:08:48,444 --> 00:08:50,530
In the Teton
Mountains of Wyoming,
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another American icon is
planning even further ahead.
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00:09:12,593 --> 00:09:15,388
This female moose has
spent the year alone.
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00:09:19,559 --> 00:09:22,687
With fall here, she
wants to become a mom.
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00:09:24,480 --> 00:09:27,525
And now, she's the
center of attention.
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00:09:31,237 --> 00:09:34,282
This huge male has
been on her for days.
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00:09:42,248 --> 00:09:44,792
Sure, he's got
five-foot antlers.
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00:09:45,585 --> 00:09:48,462
But they can hit six-foot.
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00:09:50,715 --> 00:09:54,885
Let's just say she's
keeping her options open.
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00:10:01,142 --> 00:10:04,645
Now, this guy has
got her attention.
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00:10:06,397 --> 00:10:08,399
Tall, dark, and handsome.
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He's got moves.
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00:10:17,116 --> 00:10:18,200
Impressive!
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00:10:20,828 --> 00:10:24,081
These two will fight over the
right to mate with the female.
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00:10:26,626 --> 00:10:29,337
But only when she decides
the time is right.
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00:10:31,881 --> 00:10:35,801
If she mates right now, her calf
will be born in the middle of winter
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and may not survive.
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00:10:38,971 --> 00:10:44,268
If she holds out just a little bit longer,
it could be born in the warmth of spring.
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Timing is everything.
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00:10:57,907 --> 00:11:03,579
After a month, things get
a little... hmm, weird.
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Sniffing...
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00:11:12,129 --> 00:11:13,422
thrashing...
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00:11:18,010 --> 00:11:20,262
And quite a bit of this.
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Male urine is full
of pheromones,
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sort of a moose aphrodisiac.
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00:11:30,064 --> 00:11:33,859
She has to resist it,
though. It's still too early.
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00:11:34,110 --> 00:11:37,530
Just be patient, big guy.
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00:11:44,662 --> 00:11:47,790
Two months in, and
winter shows its hand.
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00:11:52,628 --> 00:11:54,213
With colder temperatures...
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come shorter days.
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00:11:58,634 --> 00:12:01,053
That's the cue she's
been waiting for.
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00:12:03,431 --> 00:12:05,015
Now, she's ready.
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00:12:07,017 --> 00:12:08,894
And the bulls know it.
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00:12:18,946 --> 00:12:22,324
Their neck muscles have
doubled in size over the summer
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in preparation for
this exact moment.
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They leverage 1,600
pounds of power...
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00:12:37,965 --> 00:12:39,258
to breaking point.
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00:12:47,683 --> 00:12:49,560
The antler will grow again.
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00:12:50,394 --> 00:12:53,397
Now, his pride? That'll
take some healing.
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00:12:58,277 --> 00:13:00,488
Our female's got
her timing right.
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00:13:01,030 --> 00:13:03,574
Her calf will be born
eight months from now,
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at the best possible time.
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00:13:10,539 --> 00:13:13,751
But first, there's
winter to deal with.
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The mountains of the Northwest
are the tallest in North America.
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Many over 14,000 feet.
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00:13:37,191 --> 00:13:41,612
And they see some of the most
extreme winter weather on Earth.
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Humid air blows in
from the Pacific.
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00:13:51,705 --> 00:13:54,250
It crashes against
the frozen peaks.
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00:13:58,838 --> 00:14:04,927
Resulting in epic snowfall. Up
to 100 feet in a single year.
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00:14:15,104 --> 00:14:18,858
The further north you go,
the harder the winter hits.
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00:14:29,076 --> 00:14:32,246
Alaska is the northernmost
state in the U.S.,
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00:14:33,747 --> 00:14:37,960
though even here, there's one
place which doesn't freeze.
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00:14:39,128 --> 00:14:44,008
The Chilkat River, heated from
below by geothermal vents.
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00:14:46,969 --> 00:14:49,680
Chilkat means
"salmon storehouse"
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in the language of the
local Tlingit people.
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00:14:53,517 --> 00:14:57,062
And one hungry American
hero knows just why.
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00:15:03,527 --> 00:15:07,031
This young bald eagle's been
struggling to find food.
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00:15:08,991 --> 00:15:11,744
Most eagles don't make it
through their first winter.
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00:15:13,037 --> 00:15:15,998
But here, because the
river doesn't freeze,
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00:15:16,749 --> 00:15:19,960
he can access dead fish
from the salmon run...
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00:15:21,337 --> 00:15:23,422
to boost his
chances of survival.
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00:15:32,264 --> 00:15:35,225
Only problem is,
he's got company.
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00:15:41,023 --> 00:15:43,359
Well, that's intimidating.
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00:15:45,778 --> 00:15:50,449
Almost 4,000 bald eagles come
to feed here every winter.
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00:15:52,701 --> 00:15:54,828
The largest gathering
in the world.
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00:15:56,288 --> 00:15:58,624
And it's every eagle for itself.
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00:16:06,465 --> 00:16:08,676
With a wingspan of eight feet,
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00:16:08,759 --> 00:16:13,389
the females are the largest
and the most aggressive.
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00:16:27,069 --> 00:16:28,654
That head tilt tells him,
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00:16:28,988 --> 00:16:33,701
"You don't want any problems.
Back off. The fish is mine."
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00:16:37,830 --> 00:16:41,792
He's hungry, but he's also
afraid of getting hurt.
139
00:16:48,590 --> 00:16:51,051
From the sidelines, he
can see that around here,
140
00:16:51,385 --> 00:16:53,178
you have to fight to survive.
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00:17:37,931 --> 00:17:42,561
He could hold back, stay
safe, and face starvation.
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00:17:44,271 --> 00:17:46,356
But he decides to risk it all.
143
00:18:19,640 --> 00:18:21,391
Through sheer determination,
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00:18:21,892 --> 00:18:25,771
he’s fought off the elders
and staked his claim.
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00:18:32,778 --> 00:18:36,740
These vital calories will help
him through the hard months ahead.
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00:18:45,833 --> 00:18:48,460
Nowhere does winter like here.
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00:18:49,044 --> 00:18:52,798
Denali, the highest
mountain in North America,
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00:18:53,215 --> 00:18:57,386
and at minus 100 degrees,
the coldest on Earth.
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00:19:00,681 --> 00:19:03,934
With the last light
disappearing over the horizon,
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00:19:04,184 --> 00:19:09,565
the clock starts on the hardest,
darkest months of the year.
151
00:19:14,069 --> 00:19:16,905
Though sometimes,
there's magic in the air.
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00:19:23,120 --> 00:19:27,875
The absolute dark makes Alaska
one of the best places on Earth
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00:19:28,125 --> 00:19:33,964
to witness the aurora borealis.
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00:20:11,793 --> 00:20:15,672
In Ellesmere, polar winds
rip through the barren hills.
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00:20:27,726 --> 00:20:29,645
You can’t complain
about the cold
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00:20:29,895 --> 00:20:32,481
when your ancestors
survived the Ice Age.
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00:20:35,525 --> 00:20:41,281
Under their long guard hairs, the
musk oxen have grown a fine underwool,
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the warmest fiber in the world.
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00:20:47,287 --> 00:20:52,209
In the dead of winter, they slow
their metabolism by 30 percent.
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00:20:59,299 --> 00:21:01,843
They're the ultimate
arctic survivors.
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00:21:02,386 --> 00:21:05,472
Staying slow to stay alive.
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00:21:12,980 --> 00:21:16,692
Winter takes northern
heroes to their limits.
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00:21:20,153 --> 00:21:23,657
But eventually, the
good times return.
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Spring.
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00:21:41,174 --> 00:21:44,386
The warmth sweeps
northwards into Alaska.
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00:21:58,900 --> 00:22:01,361
A wake-up call for brown bears.
167
00:22:03,196 --> 00:22:06,074
A mom and her two new cubs.
168
00:22:09,453 --> 00:22:12,164
She nursed them through the
winter inside her den...
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00:22:14,958 --> 00:22:17,669
but it cost 30 percent
of her body weight.
170
00:22:18,503 --> 00:22:20,213
She needs to eat fast.
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00:22:23,300 --> 00:22:26,553
The cubs are just enjoying
their newfound freedom.
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00:22:31,600 --> 00:22:35,270
A snow day. It's the ultimate
cure for cabin fever.
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00:22:36,063 --> 00:22:37,230
Gotcha!
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00:22:55,999 --> 00:22:59,586
The only way to get these
little guys' attention is milk.
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00:23:08,011 --> 00:23:11,223
Out of the den, their
intake quadruples.
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00:23:18,313 --> 00:23:20,816
They’ll need over a
half gallon a day.
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00:23:27,239 --> 00:23:30,492
To keep the family fed,
she follows her nose.
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00:23:31,618 --> 00:23:34,246
Two thousand times more
sensitive than ours.
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00:23:42,087 --> 00:23:47,676
Jackpot! A termite nest, full
of protein-packed insects.
180
00:23:58,687 --> 00:24:01,231
It’s their first
taste of solid food.
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Though this meal bites back.
182
00:24:13,452 --> 00:24:19,249
This snack buys Mom some time, but
there’s not much else up here to eat.
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00:24:23,879 --> 00:24:29,551
She knows that if she can just get
them down the mountain, a feast awaits.
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00:24:47,110 --> 00:24:51,323
She’s not the only new mom who
needs to step up for her family.
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00:25:03,210 --> 00:25:06,296
The Ellesmere wolf pack
made it through the winter.
186
00:25:10,008 --> 00:25:11,760
They got four new pups to feed.
187
00:25:24,397 --> 00:25:27,317
A musk ox calf won’t
feed them all this time.
188
00:25:30,445 --> 00:25:32,948
Taking on an adult is high risk.
189
00:25:36,117 --> 00:25:39,496
But the alpha knows
there’s no other choice.
190
00:25:41,665 --> 00:25:45,043
In 24-hour daylight,
there’s nowhere to hide.
191
00:25:46,086 --> 00:25:49,756
So, the pack stalks downwind
to hide their scent.
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00:26:04,563 --> 00:26:07,524
Like before, the
fastest split the herd
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00:26:07,691 --> 00:26:09,943
and single out a weak adult.
194
00:26:16,658 --> 00:26:19,911
This time, the rest
of the pack closes in.
195
00:26:28,086 --> 00:26:32,424
It’s an ancient battle between
two heroes of the frozen north.
196
00:26:37,804 --> 00:26:41,933
And the pups, they're learning the
art of the hunt through their elders.
197
00:27:05,457 --> 00:27:07,375
Thanks to the
alpha's leadership,
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00:27:07,459 --> 00:27:11,504
the pack will thrive on
the arctic edge of America.
199
00:27:19,137 --> 00:27:24,768
On the Cascade Range in Washington
State, the snow has almost disappeared.
200
00:27:27,145 --> 00:27:28,647
Even Mount Baker,
201
00:27:29,689 --> 00:27:33,485
holder of the world record for
highest snowfall in a single winter,
202
00:27:34,235 --> 00:27:35,612
is shedding its coat.
203
00:27:38,281 --> 00:27:42,952
The 50-foot winter snowpack
feeds huge glaciers.
204
00:27:47,415 --> 00:27:53,046
And as the spring sun shines down,
the snow and ice begin to melt.
205
00:28:07,811 --> 00:28:12,232
Drops become trickles,
trickles become streams,
206
00:28:12,691 --> 00:28:16,319
until a flood of water
lubricates the glacier.
207
00:28:21,700 --> 00:28:24,411
A river of ice slides
down the mountain...
208
00:28:33,920 --> 00:28:36,339
forming condo-sized crevasses,
209
00:28:38,174 --> 00:28:41,261
and relentlessly
grinding stone to rubble.
210
00:28:53,022 --> 00:28:57,444
Glaciers carve some of America’s
most iconic landscapes.
211
00:29:02,240 --> 00:29:05,994
From the Alaskan
Range to the Cascades,
212
00:29:07,287 --> 00:29:12,542
where 26 glaciers flow down the
volcanic slopes of Mount Rainier.
213
00:29:16,880 --> 00:29:21,050
As the weather warms,
more and more ice melts,
214
00:29:21,342 --> 00:29:23,386
pouring down the mountainside.
215
00:29:27,265 --> 00:29:29,726
Transforming alpine valleys.
216
00:29:38,401 --> 00:29:42,405
After eight months of snow,
the meadows erupt with color.
217
00:29:44,908 --> 00:29:47,577
As thousands of
wildflowers bloom...
218
00:29:52,081 --> 00:29:55,919
the slopes of Mount Rainier
are known as “Paradise.”
219
00:29:56,336 --> 00:30:00,006
The perfect home if flowers
are your favorite food.
220
00:30:03,968 --> 00:30:06,513
A marmot and his mate.
221
00:30:07,931 --> 00:30:11,476
Just awake after nearly
eight months of hibernation.
222
00:30:14,103 --> 00:30:18,358
Like the bears, they’ve lost a third
of their body weight underground,
223
00:30:18,441 --> 00:30:19,776
and need to eat.
224
00:30:20,485 --> 00:30:23,112
Right now though,
they’re running on empty
225
00:30:23,613 --> 00:30:27,784
and just the thought of a
flower is... exhausting.
226
00:30:33,498 --> 00:30:37,752
Cool mountain mornings make
it extra tough to get going.
227
00:30:42,465 --> 00:30:45,301
The grown-ups catch
some rays to warm up.
228
00:30:56,187 --> 00:30:58,857
And the kids beat them
down to breakfast.
229
00:31:07,448 --> 00:31:11,494
These growing boys have to do all
their eating for the whole year
230
00:31:11,619 --> 00:31:13,997
in the four months while
they’re above ground.
231
00:31:15,915 --> 00:31:19,377
They can eat half their body
weight in flowers every day.
232
00:31:21,838 --> 00:31:24,465
Those flowers are packed
with sweet nectar,
233
00:31:25,508 --> 00:31:29,262
so it’s not long
before the sugar rush.
234
00:31:33,975 --> 00:31:37,103
Roughhousing provides
a long-overdue workout.
235
00:31:39,689 --> 00:31:42,400
It's the fastest way to build
muscle tone and strength.
236
00:32:01,085 --> 00:32:03,630
Oh, come on! No biting!
237
00:32:06,966 --> 00:32:09,594
Some nice moves! Not bad.
238
00:32:22,857 --> 00:32:24,067
A clear winner.
239
00:32:24,609 --> 00:32:27,320
Now, back to the buffet.
240
00:32:28,655 --> 00:32:32,825
The marmots will make every
moment and every mouthful count,
241
00:32:33,743 --> 00:32:35,370
while paradise blooms.
242
00:32:38,164 --> 00:32:43,002
On the neighboring mountain, a
cousin of the marmots is even busier.
243
00:32:46,547 --> 00:32:48,591
An all-American architect.
244
00:32:56,516 --> 00:32:57,684
A beaver.
245
00:32:58,893 --> 00:33:00,979
He's doing what beavers do best.
246
00:33:03,815 --> 00:33:06,734
He’s building a dam
to create a pond.
247
00:33:11,322 --> 00:33:15,368
A family of four can build
almost five feet of dam a day.
248
00:33:19,747 --> 00:33:23,835
Their pond is a barrier, keeping
predators away from their lodge,
249
00:33:24,836 --> 00:33:26,170
their family home.
250
00:33:35,805 --> 00:33:38,766
And pond-building here
has other significance,
251
00:33:38,850 --> 00:33:40,852
as this is no ordinary mountain.
252
00:33:42,311 --> 00:33:44,981
This is Mount Saint Helens.
253
00:33:47,608 --> 00:33:50,903
In 1980, this volcano erupted
254
00:33:51,529 --> 00:33:55,867
with the power of
25,000 atomic bombs.
255
00:34:03,833 --> 00:34:06,794
Thirteen hundred feet
blew off the summit...
256
00:34:10,423 --> 00:34:13,885
leaving a crater the size of
a thousand football fields.
257
00:34:16,929 --> 00:34:19,140
The explosion ripped
through the forest...
258
00:34:21,434 --> 00:34:24,312
leveling an area as
large as Chicago.
259
00:34:28,775 --> 00:34:31,402
Thousands of trees were
blown from the hillside
260
00:34:31,944 --> 00:34:33,863
and plunged into Spirit Lake.
261
00:34:40,536 --> 00:34:42,080
Nothing survived.
262
00:34:46,459 --> 00:34:48,669
It looked like a wasteland.
263
00:34:51,881 --> 00:34:55,676
But amongst the devastation,
the beavers saw potential.
264
00:34:57,512 --> 00:35:01,682
With running water and plenty of
shattered wood for building materials,
265
00:35:02,809 --> 00:35:05,686
they moved in and got to work...
266
00:35:08,064 --> 00:35:13,069
the population soon growing as their
network of dams and ponds spread.
267
00:35:23,996 --> 00:35:28,835
In just 40 years, these eco-engineers
transformed Mount Saint Helens
268
00:35:28,960 --> 00:35:30,878
into a wetland paradise.
269
00:35:37,927 --> 00:35:42,014
Their dams hold back water
that would otherwise flow away.
270
00:35:47,228 --> 00:35:51,941
They provide water for plants and a
home for hundreds of animal species.
271
00:36:08,082 --> 00:36:11,919
The beavers have brought
nature back, big time.
272
00:36:19,635 --> 00:36:21,387
And the benefits
of their hard work
273
00:36:21,470 --> 00:36:24,056
are felt far beyond
this neighborhood.
274
00:36:28,853 --> 00:36:31,439
By slowing the flow of
water down the mountain,
275
00:36:32,273 --> 00:36:34,775
their ponds keep rivers
running year-round...
276
00:36:37,236 --> 00:36:40,156
feeding lush forests
with nutrient-rich water
277
00:36:40,239 --> 00:36:42,241
all the way to the Pacific...
278
00:36:48,956 --> 00:36:52,960
where one of the greatest shows
on Earth is about to begin.
279
00:36:59,050 --> 00:37:04,722
Every fall, the Pacific Northwest
is the setting for the salmon run.
280
00:37:07,892 --> 00:37:11,437
After years at sea,
millions of salmon gather,
281
00:37:11,938 --> 00:37:15,483
driven by the instinct to
swim upriver and breed.
282
00:37:20,488 --> 00:37:21,948
In Northern California,
283
00:37:22,198 --> 00:37:25,993
they must squeeze through the
narrow mouth of the Klamath River.
284
00:37:31,791 --> 00:37:34,877
Predators swim in from
hundreds of miles away,
285
00:37:35,628 --> 00:37:37,755
timing their arrival
for this event.
286
00:37:47,598 --> 00:37:52,103
Sea lions, they’re just waiting for
the fish to make the first move.
287
00:38:00,778 --> 00:38:05,116
As the tide rises, the salmon
surge towards the river's mouth.
288
00:38:17,295 --> 00:38:20,673
Squeezed together, they
have no room to maneuver.
289
00:38:24,385 --> 00:38:28,055
The sea lions use the waves
to turbo-boost their chase.
290
00:38:33,019 --> 00:38:35,104
They single out
individual salmon...
291
00:38:37,273 --> 00:38:38,858
and drive them onto the beach.
292
00:38:44,572 --> 00:38:47,074
Around here, you gotta eat fast.
293
00:38:48,075 --> 00:38:51,245
There could be a larger
sea lion on the next wave.
294
00:38:55,541 --> 00:38:57,251
A thousand-pound thief
295
00:38:57,335 --> 00:39:00,379
looking to muscle in and
steal your hard-earned lunch.
296
00:39:28,324 --> 00:39:31,827
For a month, every high
tide is a feeding frenzy...
297
00:39:34,288 --> 00:39:37,416
as sea lions and seabirds
gorge themselves.
298
00:39:52,932 --> 00:39:56,602
Every sea lion eats up to
35 pounds of fish a day.
299
00:40:03,317 --> 00:40:07,071
But there are so many salmon
that 98 percent make it through.
300
00:40:16,872 --> 00:40:21,585
By late summer, the fish are returning
to rivers all along the northwest coast.
301
00:40:25,005 --> 00:40:30,511
Alaska’s Bristol Bay hosts the
largest salmon run in the world.
302
00:40:33,889 --> 00:40:38,352
Up to 65 million sockeye
salmon are swimming upstream.
303
00:40:39,687 --> 00:40:42,565
Their journey might be
several hundred miles.
304
00:40:53,534 --> 00:40:57,246
And these amazing navigators
use their sense of smell
305
00:40:57,329 --> 00:40:59,915
to guide them back to
the exact patch of river
306
00:41:00,374 --> 00:41:02,626
where they hatched
four years ago.
307
00:41:14,555 --> 00:41:17,141
But they don’t quite have
the place to themselves.
308
00:41:22,021 --> 00:41:25,357
Mama bear and her two cubs have
made it down from the mountains.
309
00:41:37,786 --> 00:41:40,748
She’s done well to
keep both cubs alive.
310
00:41:40,956 --> 00:41:44,335
Up to 40 percent don’t make
it through their first year.
311
00:41:49,340 --> 00:41:51,717
She’s exhausted though.
312
00:41:52,885 --> 00:41:56,388
It’s time they learned to
stand on their own four paws.
313
00:42:03,562 --> 00:42:05,773
Time for Fishing 101.
314
00:42:08,359 --> 00:42:10,444
Just watch me, kids.
315
00:42:29,547 --> 00:42:31,924
Oh! So close.
316
00:42:38,472 --> 00:42:39,515
Nope.
317
00:42:41,183 --> 00:42:43,352
Termites were way
easier than this.
318
00:43:00,703 --> 00:43:01,829
Mom's not worried.
319
00:43:01,912 --> 00:43:05,040
She knows it will soon be much
easier to catch a meal here
320
00:43:05,124 --> 00:43:06,404
because the salmon are changing.
321
00:43:09,545 --> 00:43:10,754
They’ve stopped eating,
322
00:43:12,089 --> 00:43:15,509
and all the males have
become mating machines.
323
00:43:17,511 --> 00:43:21,682
That hunched back? It's kind
of like a sockeye six-pack.
324
00:43:23,934 --> 00:43:25,311
Check it out, ladies.
325
00:43:27,021 --> 00:43:30,441
And those teeth?
Mmm, irresistible.
326
00:43:35,070 --> 00:43:38,699
While the males show off, the
females are being more practical,
327
00:43:39,408 --> 00:43:42,244
looking for the best patch
of riverbed to lay eggs.
328
00:43:49,126 --> 00:43:54,506
They fight over the shallow spots where
the water’s cool and rich in oxygen.
329
00:43:56,592 --> 00:43:58,427
Then each prepares a nest,
330
00:44:00,054 --> 00:44:02,806
clearing away silt that
could suffocate her eggs.
331
00:44:12,316 --> 00:44:14,777
She lays over 4,000...
332
00:44:16,987 --> 00:44:19,198
and the male adds
clouds of sperm.
333
00:44:26,705 --> 00:44:31,960
Across Alaska, millions of salmon
nests hold billions of eggs.
334
00:44:43,430 --> 00:44:45,599
Exhausted and starved,
335
00:44:46,642 --> 00:44:49,228
the salmon die soon
after spawning.
336
00:44:51,647 --> 00:44:54,775
But even in death,
they bring life.
337
00:44:56,193 --> 00:44:59,154
The decaying bodies
merge with the riverbank.
338
00:45:00,864 --> 00:45:05,619
The biggest transfer of nutrients
from ocean to land on Earth.
339
00:45:09,915 --> 00:45:12,584
Plant food for the great
forest of the north,
340
00:45:13,252 --> 00:45:17,673
where trees grow three times
faster along salmon-stocked rivers.
341
00:45:24,263 --> 00:45:27,433
Dead fish are an easy
meal for patient cubs.
342
00:45:33,689 --> 00:45:35,983
These two will fatten
up quickly now,
343
00:45:37,735 --> 00:45:40,738
just in time to climb the
mountain back to their den.
344
00:45:46,827 --> 00:45:51,415
Winter will come again,
hard. But they’ll be ready.
345
00:45:53,250 --> 00:45:57,588
The snow, though fierce, will
be the lifeblood of next summer,
346
00:45:58,630 --> 00:46:03,218
allowing life to thrive across
the northlands of America.28580
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