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CHRIS: From on board the
spaceship, you can see
the world has a secret.
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00:00:11,028 --> 00:00:15,698
At dawn or at dusk, where
the shadows are lining
up just the right way,
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00:00:15,733 --> 00:00:22,971
you're at just the
right place in time to
see an asteroid crater.
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00:00:23,007 --> 00:00:30,312
Where a bullet from the universe
left a perpetual hole in the
smooth surface of our planet.
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00:00:30,347 --> 00:00:34,383
There are a billion
years worth of impacts.
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00:00:34,418 --> 00:00:42,024
Huge asteroids have smashed
into the world, and turned
it into an enveloped fire.
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Uninhabitable to almost
all life on the surface.
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00:00:50,000 --> 00:00:55,304
The world will get hit again.
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00:00:55,339 --> 00:00:57,039
It's just a matter of when.
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00:00:57,975 --> 00:01:02,845
So, what should we
do as a species?
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00:01:02,880 --> 00:01:08,217
Should we just, like the
dinosaurs, look up and die?
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00:01:10,821 --> 00:01:15,457
The reasons the dinosaurs
are extinct is they didn't
have a space program.
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00:01:15,493 --> 00:01:18,026
We do.
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We have the capability to
perhaps escape the Earth.
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NARRATOR: Escaping Earth?
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00:01:29,573 --> 00:01:33,342
Leaving home is hardat the best of time.
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Imagine how hard it would beif you were never coming back.
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00:01:38,349 --> 00:01:42,985
Not just back to your hometown, but your home planet.
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WILL: A one-way ticket away
from everywhere, everything and
everyone you know and need.
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00:01:54,865 --> 00:01:59,434
NARRATOR: 8 astronautswith over 1,000 daysin space between then,
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can tell us how being up therehelped them to understand
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00:02:03,307 --> 00:02:06,975
why we are going tohave to make a choice.
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00:02:07,011 --> 00:02:10,946
MIKE: Faced with extinction
of life on Earth.
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00:02:10,981 --> 00:02:17,352
Our best chance of survival
is to build another
colony somewhere else.
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00:02:17,388 --> 00:02:21,423
LELAND: Having a base
on Mars, a base on the
moon or in other places,
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00:02:21,458 --> 00:02:24,726
is important to keep
our civilization going.
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CHRIS: It's really kinda
up to us how long we wanna
survive as a species.
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NARRATOR: Can we reallycut the cord with theplanet that made us?
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And face the physical extremesand mental torment of space?
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00:02:43,914 --> 00:02:46,248
WILL: Theanswers are
right here on earth.
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00:02:46,283 --> 00:02:49,151
In some pretty
unexpected places.
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NARRATOR: Likemulti-million-year-old blood.
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Mutant bugs.
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And humans that hadleft the land behind.
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00:03:06,837 --> 00:03:11,073
CHRIS: It is not going
to be easy to get ourselves
safely away from the Earth
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and onto another planet.
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People will die.
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00:03:19,283 --> 00:03:21,950
This maybe what saves us.
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WILL: It's decision
time on The Rock.
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00:03:28,125 --> 00:03:30,292
Escape or extinction?
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NARRATOR: Earth's beenthrough some big changes.
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Ice ages have come and gone...
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Volcanoes have blanketedthe world in ash.
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And all of thiscould happen again.
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00:04:02,326 --> 00:04:05,327
In fact, sooner orlater, it's going to.
46
00:04:06,830 --> 00:04:13,135
So, if we knew a hugeasteroid was bearing down...
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00:04:13,170 --> 00:04:17,572
Or a giant eruption was aboutto suffocate the planet...
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00:04:20,778 --> 00:04:26,114
We'd feel a lot betterif we had a Plan B.
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CHRIS: To put a human
base on another planet,
it will involve risk.
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00:04:31,755 --> 00:04:37,526
It pushes our technology
right to the very
edge of our capability.
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But the benefit is
for the whole species.
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CAPT. BOWEN: So today, what
we're going out there to do
is intercept the eclipse.
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00:05:00,517 --> 00:05:03,352
Really experience the
full eclipse since
it happens so rarely.
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Fly and chase the moon.
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00:05:04,922 --> 00:05:07,389
You can't do it every day.
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00:05:07,424 --> 00:05:11,526
At 15 is rated almost
up to mach 2.5.
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00:05:11,562 --> 00:05:16,665
So, our goal is
approximately three minutes
of time in the shadow.
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NARRATOR: Alright, letme break that down.
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Luckily, my dad was in theAir Force, so I can do this.
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00:05:24,942 --> 00:05:30,979
These guys are going totry something they'venever done before.
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Something that shows howhard it is to go from1 planet to another.
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Everything in ourgalaxy is moving.
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00:05:45,195 --> 00:05:50,298
During an eclipse, when themoon slides across the sun...
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Its shadow speeds over theair at 1700 miles per hour.
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00:05:58,042 --> 00:06:02,944
But it's easy to forgetthat we're moving too.
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Our planet spins at1,000 miles per hour.
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00:06:09,420 --> 00:06:14,489
To stay in the moon'sshadow, the planes have tofly faster than earth spins.
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CAPT. BOWEN: 3 3 units,
mark ready, ready now.
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This is definitelythe ultimate intercept.
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Chasing the fastest objectthat we could chase.
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If we can do this, wecan intercept anything.
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Keep it tight, the
eclipse is coming.
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PILOT: Here comes the shadow
out in front of us now.
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CAPT. BOWEN: Alright
stand by for.
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OK.
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PILOT: That's pretty cool.
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00:07:00,671 --> 00:07:02,404
CAPT. BOWEN: 20 seconds.
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00:07:10,547 --> 00:07:12,481
It's almost like
you're in outer space.
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00:07:20,557 --> 00:07:22,023
As a kid, you know, youalways think aboutastronauts and travelling
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00:07:22,059 --> 00:07:26,394
to space and circling the moon.
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00:07:26,430 --> 00:07:28,330
But I never thought of howfast the moon was travelling.
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00:07:34,705 --> 00:07:36,938
OK 5:30 into the eclipse.
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00:07:41,278 --> 00:07:42,777
Here comes the daylight.
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And it's daytime.
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00:07:52,723 --> 00:07:56,091
CHRIS: If you're in an
aeroplane and trying
to chase that shadow,
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00:07:56,126 --> 00:08:03,398
that's really just a little hint
of how hard it is to launch a
rocket ship and go intercept
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00:08:03,433 --> 00:08:08,270
the moon or go all the
way out to Mars where
everything is moving.
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00:08:08,305 --> 00:08:10,438
And the Earth isn't
just rotating.
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00:08:10,474 --> 00:08:14,576
It's moving through space at
almost 70,000 miles an hour.
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00:08:14,611 --> 00:08:19,214
While Mars is moving at
over 50,000 miles an hour.
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00:08:19,249 --> 00:08:26,121
It's like grabbing
a gun and trying to hit
a bullet with a bullet.
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00:08:26,156 --> 00:08:30,192
We've sent probes to Mars
and to Jupiter and to Saturn.
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00:08:30,227 --> 00:08:32,360
But probes are machines.
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00:08:32,396 --> 00:08:34,462
Getting people there?
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00:08:34,498 --> 00:08:37,566
That's a whole other
level of difficult.
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00:08:43,307 --> 00:08:47,442
So before we make
that commitment and
fire those engines,
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00:08:47,477 --> 00:08:52,781
we really wanna be sure
we know what we're doing.
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00:08:52,816 --> 00:08:58,119
The natural human reaction
to the unknown is fear.
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00:08:58,155 --> 00:09:03,725
But the greatest antidote
for fear is preparation.
100
00:09:03,760 --> 00:09:08,029
Part of the reason I love
flight is how it makes me feel.
101
00:09:08,065 --> 00:09:12,133
It pushes me a little bit closer
to the limit of my capabilities.
102
00:09:12,169 --> 00:09:14,469
Especially when you're
flying an older plane.
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00:09:14,504 --> 00:09:16,438
Just barely give it
a couple of these.
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00:09:20,210 --> 00:09:23,478
You have to focus, you have to
constantly thing about what are
the things that are gonna try
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00:09:23,513 --> 00:09:27,315
and kill me.
106
00:09:27,351 --> 00:09:31,453
Try and predict what the
dangers are going to be.
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00:09:31,488 --> 00:09:33,588
And then try and
get ready for those.
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Pull her out.
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Yeah.
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Here we go.
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Permanently leaving the earth.
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00:09:47,537 --> 00:09:51,206
Turning our tail
to the planet and firing the
engines to go somewhere else,
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00:09:51,241 --> 00:09:54,075
that is still right on
the edge of impossible.
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00:09:58,849 --> 00:10:04,452
But in 1902, flying
was impossible.
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00:10:04,488 --> 00:10:07,555
But after the Wright
Brothers, it was something
we knew how to do.
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00:10:11,128 --> 00:10:14,562
Summer of '69, impossible
to walk on the moon.
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00:10:14,598 --> 00:10:22,370
And then 12 people put their
grey, dusty footprints into
the surface of the moon.
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00:10:22,406 --> 00:10:29,110
So I think we'll go from a
space station to the moon
and eventually onto Mars.
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00:10:29,146 --> 00:10:32,781
Because it's a necessary thing
for the survival of our species.
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00:10:35,085 --> 00:10:37,986
NARRATOR: They call ita Goldilocks planet.
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00:10:38,021 --> 00:10:41,289
A world that's not toohot and not too cold.
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00:10:41,325 --> 00:10:43,191
Just like Earth.
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00:10:43,226 --> 00:10:46,328
WILL: Until we find it, we're
looking at the next best thing.
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00:10:46,363 --> 00:10:49,431
Life on Mars.
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00:10:49,466 --> 00:10:55,136
But even if we have
the technology to leave our
home, do we have the biology?
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00:11:05,582 --> 00:11:07,716
NARRATOR: Nothinggood lasts forever.
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00:11:07,751 --> 00:11:11,286
Earth is no different.
128
00:11:11,321 --> 00:11:15,657
WILL: If we want to outlast our
home, we need to franchise.
129
00:11:15,693 --> 00:11:18,560
Set up an outlet
on another planet.
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00:11:21,098 --> 00:11:25,567
NARRATOR: When we leaveearth, we leave behindmore than a rock.
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00:11:25,602 --> 00:11:28,670
Earth is a living planet.
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An interconnected web of life.
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00:11:32,643 --> 00:11:37,279
We are part of itand it is part of us.
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00:11:37,314 --> 00:11:41,249
WILL: So when we go, what
comes and what stays.
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00:11:44,855 --> 00:11:48,457
CHRIS: One of the final
stages of preparation
for my third space flight
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to fly a Russian spaceship,
was wiping my entire body
with rubbing alcohol.
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00:11:54,531 --> 00:11:58,133
To try and get rid of as
many bacteria as possible.
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00:12:01,472 --> 00:12:07,275
You don't want the spaceship
to become unhealthy for the
people living there.
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00:12:07,311 --> 00:12:12,214
But bacteria have been
colonizing the planet
for billions of years.
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00:12:12,249 --> 00:12:15,117
And they're pretty good
at getting everywhere.
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00:12:24,361 --> 00:12:29,664
To spot them we have to
use something else that's
survived for a long time.
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00:12:36,507 --> 00:12:44,346
Horseshoe crabs were
alive 200 Million years
before the dinosaurs.
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00:12:44,381 --> 00:12:48,683
And yet, they've turned out to
be surprisingly useful in space.
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00:12:52,990 --> 00:12:58,827
Their immune system is
primitive but effective.
145
00:12:58,862 --> 00:13:02,931
So we make use of their
incredible blue blood.
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00:13:07,504 --> 00:13:15,777
When cells in their blood come
into contact with bacteria,
they instantly release enzymes.
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00:13:15,813 --> 00:13:23,685
And these enzymes can be used
to detect bacteria at less
than one part per trillion.
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00:13:23,720 --> 00:13:29,524
That's like detecting
one grain of sugar in an
Olympic size swimming pool.
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00:13:29,560 --> 00:13:36,498
So we can use a tiny spec
of horseshoe crab blood
to spot contamination.
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00:13:38,669 --> 00:13:43,104
It's easy to think of the
bacteria on my body as some
foreign matter that I would like
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00:13:43,140 --> 00:13:45,340
to get rid of.
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00:13:45,375 --> 00:13:52,480
But if you look
at us under a microscope,
we're crawling with life.
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00:13:52,516 --> 00:13:59,387
There are more bacterial
cells in our body than
there are human cells.
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An entire universe inside me.
155
00:14:08,866 --> 00:14:15,403
The more we study the human
microbiome, all of the little
microbes that live within us,
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00:14:15,439 --> 00:14:19,741
and especially when we
start thinking about leaving
earth, the more we realize,
157
00:14:19,776 --> 00:14:24,079
the bacteria aren't
stowaways, they're crew.
158
00:14:24,114 --> 00:14:28,149
And we're going to have to
bring some of them with us,
when we go to another planet.
159
00:14:28,185 --> 00:14:40,996
(music)
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00:14:41,031 --> 00:14:42,797
DR. KERR: How far are
they, ahead, do you think?
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MALE CREW: I would
say absolute minimum of two,
probably at least three miles.
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00:14:53,110 --> 00:14:58,446
NARRATOR: We are searching forthe world's biggest creature.
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The blue whale.
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00:15:02,185 --> 00:15:08,990
Most species on the planetare totally dependant ontheir microbiomes to survive.
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00:15:09,026 --> 00:15:13,428
It's amazing how similarwhales and humans are.
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Even though we walk on the landand they swim in the abyss,
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00:15:18,168 --> 00:15:21,603
the same biologicalmechanisms are in play here.
168
00:15:25,943 --> 00:15:31,479
The reality is,it's very difficult tocollect data on whales.
169
00:15:31,515 --> 00:15:35,717
Imagine if an elephantdisappeared under the Serengetiand came up five miles away.
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00:15:37,955 --> 00:15:41,356
MALE CREW: Whale's right
over here at ten o'clock.
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00:15:41,391 --> 00:15:46,928
NARRATOR: Every time a whaleexhales, it's throwing up thisbiological treasure trove.
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DR. KERR: Starting
engines, clear.
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00:15:48,732 --> 00:15:54,302
NARRATOR: So how can youcollect biological datain a non-invasive manner?
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The answer is, snot bot.
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DRONE OPERATOR: 30
plus feet, you're just
going off for visual?
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00:16:02,879 --> 00:16:04,212
MALE CREW: Yeah,
you're in good shape.
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00:16:04,247 --> 00:16:08,850
DR. KERR: And I
see the whale now.
DRONE OPERATOR: OK.
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00:16:08,885 --> 00:16:12,220
You're right to 16 feet, 16.
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00:16:12,255 --> 00:16:13,688
14.
180
00:16:13,724 --> 00:16:21,029
(music)
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00:16:21,064 --> 00:16:24,099
DR. KERR: Alright. She's dived.
No words, lovely dive.
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00:16:26,903 --> 00:16:32,474
Might not have liked that
head on approach, but
there's no way to know.
183
00:16:32,509 --> 00:16:39,381
As excited as we are with this
tool, you've gotta be at the
right place at the right time.
184
00:16:39,416 --> 00:16:41,983
OK, so the whale's been
doing 9-minute dives.
185
00:16:42,019 --> 00:16:46,588
Let's launch the drone at
8 minutes and then we're
ready when it comes up.
186
00:16:46,623 --> 00:16:48,456
Hopefully we'll get
the second blow.
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00:16:56,400 --> 00:16:59,701
DRONE OPERATOR: Looking good,
right on track. That's 14 feet.
188
00:16:59,736 --> 00:17:04,139
DR. KERR: They're exchanging a
lung full of air, probably
bigger than a VW
189
00:17:04,174 --> 00:17:06,808
in one or two seconds.
190
00:17:06,843 --> 00:17:08,643
It's incredible.
191
00:17:10,147 --> 00:17:11,679
DRONE OPERATOR: Staying with it.
DR. KERR: What's my height?
192
00:17:11,715 --> 00:17:12,914
DRONE OPERATOR: You're at 14.
193
00:17:15,585 --> 00:17:18,286
DR. KERR: Whale's
looking really calm.
194
00:17:18,321 --> 00:17:20,488
Moving very slowly.
195
00:17:33,336 --> 00:17:34,302
Bingo.
196
00:17:42,746 --> 00:17:44,512
Good job team, good job.
197
00:17:48,085 --> 00:17:50,652
Alright, you guys ready
for landing, bring her in.
198
00:17:53,757 --> 00:17:56,357
And this is gonna
be a snotty dish.
199
00:17:58,161 --> 00:18:01,963
We know bacteria in thestomach of whales isnecessary for digestion,
200
00:18:01,998 --> 00:18:07,168
but we're starting to seethat the microbiome in thelungs plays a key role
201
00:18:07,204 --> 00:18:11,339
in fighting infection. Justlike it does in humans.
202
00:18:11,374 --> 00:18:17,946
(music)
203
00:18:17,981 --> 00:18:23,451
NARRATOR: There's a world ofbacteria outside us and a worldof bacteria inside us.
204
00:18:29,126 --> 00:18:33,661
WILL: And nobody knows what
will happen when those two
worlds are pulled apart.
205
00:18:36,066 --> 00:18:40,001
But we know one thing that
we can't take with us.
206
00:18:40,036 --> 00:18:41,836
And it's something that
keep us all grounded.
207
00:18:41,872 --> 00:18:51,913
(music)
208
00:18:51,915 --> 00:19:05,894
(music)
209
00:19:05,929 --> 00:19:13,835
JONATHAN: The feeling in the
platform is full of emotion,
is fear, pressure, tension.
210
00:19:35,091 --> 00:19:37,792
It's something that
you love to do.
211
00:19:37,827 --> 00:19:41,062
Even when you know that
you can kill yourself.
212
00:19:41,097 --> 00:19:48,570
(music)
213
00:19:48,605 --> 00:19:52,907
You have only 2.9 seconds.
Anything can go wrong.
214
00:19:54,611 --> 00:19:59,347
If you did a mistake
in the air...
215
00:19:59,382 --> 00:20:01,416
That's it, it's over.
216
00:20:01,451 --> 00:20:16,297
(music)
217
00:20:16,333 --> 00:20:21,469
CHRIS: We are all intimately
familiar with gravity.
218
00:20:21,504 --> 00:20:26,474
The huge mass of the
world pulls us down.
219
00:20:26,509 --> 00:20:30,945
We call it 1 G, that's
how the world pulls on us.
220
00:20:30,981 --> 00:20:34,649
But we're the only species that
has found a way to cheat that.
221
00:20:39,356 --> 00:20:45,793
Perhaps the most magic moment in
an astronaut's life is when the
rocket ship has done its job.
222
00:20:48,164 --> 00:20:53,601
You are at the right height,
you're at the right speed,
the engine's shut off.
223
00:20:53,637 --> 00:20:58,172
You're in space and for
the first time in your
life, you're weightless.
224
00:21:01,511 --> 00:21:07,782
You feel like something
is magically pulling
you towards the ceiling.
225
00:21:07,817 --> 00:21:12,287
It's just fun to be weightless.
And leaves a smile on your face.
226
00:21:12,322 --> 00:21:14,022
You wanna play with it.
227
00:21:14,057 --> 00:21:17,158
You wanna play with
your food, you wanna do
a thousand somersaults.
228
00:21:17,193 --> 00:21:20,728
You wanna get into a big part
so the space station so you
could push off the wall
229
00:21:20,764 --> 00:21:25,833
and fly across like superman.
230
00:21:25,869 --> 00:21:31,306
But even as you feel super
human, you quickly start
to realize just how much
231
00:21:31,341 --> 00:21:33,841
the human body needs gravity.
232
00:21:35,245 --> 00:21:40,114
With gravity, I can
tell which way up is.
233
00:21:40,150 --> 00:21:45,053
The weight of my body as
I sit down, the weight
of lifting my arms.
234
00:21:45,088 --> 00:21:49,424
All of those things constantly
tell me which way is up.
235
00:21:49,459 --> 00:21:51,526
But as soon as
your weightless...
236
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all that's gone.
237
00:21:55,498 --> 00:21:57,298
And it makes you nauseous.
238
00:21:59,169 --> 00:22:02,203
MIKE: I was feeling terrible
when I first got to space.
239
00:22:02,238 --> 00:22:06,641
And I thought to myself,
is this really fun?
240
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When you wanna throw up,
really nothing's fun.
241
00:22:09,879 --> 00:22:12,380
I did puke on my
first day in space.
242
00:22:16,119 --> 00:22:22,423
MAE: When you're on Earth,
gravity is pulling all the
fluids in your body down.
243
00:22:22,459 --> 00:22:26,694
When you're up in space,
there's a major fluid shift.
244
00:22:26,730 --> 00:22:33,101
It feels like you've been
standing on your head
for about three hours.
245
00:22:33,136 --> 00:22:36,270
CHRIS: Gravity defines
how big our heart has to be
and what the configuration
246
00:22:36,306 --> 00:22:38,840
of our cardiovascular
system looks like.
247
00:22:38,875 --> 00:22:44,078
The whole design of the human
body, the skeleton underneath
it, the strength of the muscles,
248
00:22:44,114 --> 00:22:47,181
it's really shaped by the
gravity of the Earth.
249
00:22:51,821 --> 00:22:56,357
We don't really think about
it, but we're constantly
weight lifting on Earth.
250
00:22:56,393 --> 00:23:00,895
Holding our head up, holding
our body up, fighting gravity.
251
00:23:00,930 --> 00:23:06,534
Without gravity, your
muscles and your bones
start to waste away.
252
00:23:06,569 --> 00:23:11,606
We have machines that, that we
push against and lift against
and elastics that hold us
253
00:23:11,641 --> 00:23:13,174
on the treadmill.
254
00:23:13,209 --> 00:23:17,145
Sort of gravity simulations.
255
00:23:17,180 --> 00:23:22,583
But even with the best exercise
equipment we've invented so far,
I lost about eight percent
256
00:23:22,619 --> 00:23:27,288
of the bone density across
my hips and my upper femur.
257
00:23:27,323 --> 00:23:30,625
My skeleton started
to waste away.
258
00:23:34,164 --> 00:23:39,467
What do the effects of
weightlessness mean for
interplanetary exploration?
259
00:23:39,502 --> 00:23:42,970
With that long time in
weightlessness have degraded
our bodies enough that
260
00:23:43,006 --> 00:23:47,175
we'd be useless
when we get there?
261
00:23:47,210 --> 00:23:51,279
We're working on it, but we
definitely haven't solved
all those problems yet.
262
00:23:51,314 --> 00:23:52,947
WILL: Astronauts.
263
00:23:52,982 --> 00:23:56,951
Their heads swell and
they throw up a lot.
264
00:23:56,986 --> 00:23:59,454
You don't see that
in the movies.
265
00:23:59,489 --> 00:24:02,824
The truth is, we are
a part of this planet.
266
00:24:02,859 --> 00:24:05,493
It is baked into our bones.
267
00:24:05,528 --> 00:24:08,863
Down here we're
nurtured and protected.
268
00:24:08,898 --> 00:24:12,166
But when we go, we'll
be going it alone.
269
00:24:19,468 --> 00:24:27,174
ooner or later we are
going to have to get off plane.
270
00:24:27,209 --> 00:24:29,976
Plan B.
271
00:24:30,012 --> 00:24:34,648
WILL: But the second we
step outside the safety of
our home, we are exposed.
272
00:24:37,986 --> 00:24:43,356
CHRIS: Our sun is constantly
spewing out radiation.
273
00:24:43,392 --> 00:24:50,230
And occasionally there's
a huge solar flare, where
a big mass ejection
274
00:24:50,265 --> 00:24:53,900
that could threaten
life on Earth.
275
00:24:53,936 --> 00:24:58,739
The Earth is protected
by a magnetic field
in the atmosphere.
276
00:24:58,774 --> 00:25:03,977
And that force field helps
deflect the deadly radiation.
277
00:25:04,012 --> 00:25:07,380
And it keeps it from
driving right through
and hitting our bodies.
278
00:25:09,685 --> 00:25:15,188
On board the International
Space Station, we
are much more vulnerable.
279
00:25:15,224 --> 00:25:21,595
If the scientists on earth have
seen one of these huge storms
from the sun coming towards us,
280
00:25:21,630 --> 00:25:26,099
we go to the parts of the space
station that have the best
protection from the storm
281
00:25:26,135 --> 00:25:29,269
of radiation that's
about to pour past.
282
00:25:31,273 --> 00:25:39,246
You're subject to not just the
sun's radiation, but all of
the radiation of the universe.
283
00:25:39,281 --> 00:25:41,948
A strange thing
sometimes happens.
284
00:25:41,984 --> 00:25:47,254
You see a flash of light
out of the darkness.
285
00:25:47,289 --> 00:25:52,526
A reminder that you're
not in Kansas anymore.
286
00:25:52,561 --> 00:25:58,064
When a star out in our galaxy
dies in an enormous explosion
that we call a supernova,
287
00:25:58,100 --> 00:26:02,269
it releases a huge
amount of energy.
288
00:26:02,304 --> 00:26:06,873
Cosmic rays racing across
the universe at essentially
the speed of light,
289
00:26:06,909 --> 00:26:12,212
186,000 miles a second.
290
00:26:12,247 --> 00:26:17,551
So fast that those little
radiation particles come by
Pluto and make it all the way
291
00:26:17,586 --> 00:26:19,853
to the earth in just five hours.
292
00:26:22,057 --> 00:26:24,958
And if you're above
the earth's atmosphere,
293
00:26:24,993 --> 00:26:29,129
there is nothing to stop
them slamming into your body.
294
00:26:31,133 --> 00:26:34,000
Most of them you're unaware of.
295
00:26:34,036 --> 00:26:40,307
But sometimes one of these
little cosmic rays goes
through your optic nerve.
296
00:26:40,342 --> 00:26:47,180
And because of the way our
vision is designed, it actually
reacts like a flash of light.
297
00:26:47,216 --> 00:26:53,787
And what you're actually seeing
is radiation going through you.
298
00:26:53,822 --> 00:26:58,758
JEFF: I'd be lying there in my
sleeping bag and zap, zap, zap.
299
00:26:58,794 --> 00:27:03,597
One of the best light shows I've
ever seen but at the same time,
I knew that that meant
300
00:27:03,632 --> 00:27:08,201
that my head was getting
zapped by charged particles.
301
00:27:08,237 --> 00:27:13,540
JERRY: And it can be a show
stopper, it can be a bombardment
of radiation than not only,
302
00:27:13,575 --> 00:27:16,877
you know, increases your chances
of cancer down the line.
303
00:27:16,912 --> 00:27:21,047
But literally gives you
radiation sickness on the way.
304
00:27:21,083 --> 00:27:25,051
If you're gonna spend weeks or
months or years on a space ship,
305
00:27:25,087 --> 00:27:29,689
you have to start considering
that this causes mutations.
306
00:27:29,725 --> 00:27:33,593
It overwhelms your body's
ability to repair itself.
307
00:27:41,403 --> 00:27:47,340
NARRATOR: So, on our trip tocolonize the stars, we knowwe'll get seriously zapped.
308
00:27:47,376 --> 00:27:49,743
We need to prepare for that.
309
00:27:49,778 --> 00:27:54,014
We can start in a place wherethe Geiger counter clickslike it would
310
00:27:54,049 --> 00:27:55,782
in a deep space mission.
311
00:28:12,401 --> 00:28:16,636
PROF. MOUSSEAU: Despite the fact
that this is a dangerous place,
312
00:28:16,672 --> 00:28:23,476
Chernobyl provides this unique
opportunity to examine what
happens to the evolutionary
313
00:28:23,512 --> 00:28:28,081
process when you kick it with
a little extra mutation.
314
00:28:30,652 --> 00:28:34,454
NARRATOR: Back in '86, Iwas a senior in high school.
315
00:28:34,489 --> 00:28:39,693
And I remember the nuclearmeltdown that caused 400times more fallout
316
00:28:39,728 --> 00:28:41,428
than the first atomic bomb.
317
00:28:41,463 --> 00:28:50,737
(music)
318
00:28:50,772 --> 00:28:54,941
When the reactorexploded, it was kind oflike a volcano erupting.
319
00:28:54,977 --> 00:28:57,978
With radioactive metals beingejected into the atmosphere.
320
00:29:00,182 --> 00:29:04,818
That landed on the groundin a haphazard way, sothere are these hot spots.
321
00:29:04,853 --> 00:29:14,894
(music)
322
00:29:14,896 --> 00:29:25,038
(music)
323
00:29:25,073 --> 00:29:31,644
You come into this landscapethat was once thriving withhappy people doing their thing.
324
00:29:31,680 --> 00:29:33,980
It gives you an eerie feeling.
325
00:29:35,884 --> 00:29:38,651
You really have to look aroundand see what's being affected.
326
00:29:43,058 --> 00:29:46,793
Many of the spiderwebs thatwere draped alongside some ofthe houses in the villages
327
00:29:46,828 --> 00:29:48,528
were extremely unusual.
328
00:29:53,835 --> 00:29:59,372
Some of the webs end uplooking extraordinarily messy.
329
00:29:59,408 --> 00:30:01,708
They were very irregular.They had big holes in them.
330
00:30:06,181 --> 00:30:09,249
The spiders were having aproblem spinning a normal web.
331
00:30:16,958 --> 00:30:19,726
It's not just behaviorthat's changing.
332
00:30:19,761 --> 00:30:23,730
Some of the creatures are evenstarting to look different.
333
00:30:23,765 --> 00:30:29,903
And firebugs are prettyhard to miss. f youlook at it straight on,
334
00:30:29,938 --> 00:30:33,039
you'll see what lookslike an African face mask.
335
00:30:33,075 --> 00:30:36,543
Two big eyes, a nose and a chi.
336
00:30:36,578 --> 00:30:42,682
And because of thesymmetry, it makes it veryeasy to detect deviations.
337
00:30:49,291 --> 00:30:54,461
One of my colleagues pickedone up and said, "Look, Tim,it's a mutant."
338
00:30:54,496 --> 00:30:59,766
This one bug was missingone of the eye spots.
339
00:30:59,801 --> 00:31:05,939
So, we starting collecting asmany bugs as we could find.
340
00:31:05,974 --> 00:31:10,577
Bugs with really unusual colorpatterns were only found inthese areas of high radiation.
341
00:31:13,448 --> 00:31:16,950
This is more serious thanchanging your spots.
342
00:31:16,985 --> 00:31:20,286
Mutations can kill you.
343
00:31:20,322 --> 00:31:24,591
Humans in spacehave a big problem.
344
00:31:24,626 --> 00:31:28,495
WILL: So, mission cancelled?
Oh, not so fast.
345
00:31:28,530 --> 00:31:30,196
There might be a fix.
346
00:31:36,071 --> 00:31:39,372
NARRATOR: One of the morestriking, unexpectedobservations
347
00:31:39,407 --> 00:31:41,708
is that some speciesappear to have adapted.
348
00:31:46,014 --> 00:31:50,049
Some of the bacteria wherethere have been thousands ofgenerations since the accident
349
00:31:50,085 --> 00:31:52,652
are becoming moreradiation resistant.
350
00:31:58,660 --> 00:32:03,296
As a species, humansare interested inexpanding our horizons.
351
00:32:03,331 --> 00:32:08,067
Moving into space,moving to other planets.
352
00:32:08,103 --> 00:32:11,938
If we can develop abetter understanding of thedefenses used by organisms,
353
00:32:11,973 --> 00:32:15,141
that maybe useful in dopingways to protect humans.
354
00:32:16,811 --> 00:32:19,445
Both here on this rock...
355
00:32:19,481 --> 00:32:21,147
As well as in outer space.
356
00:32:28,490 --> 00:32:35,562
A traveler to Mars has tosurvive 9 months in space anda 30-Million-mile journey.
357
00:32:38,433 --> 00:32:42,835
WILL: But once they get
there, they'll face their
biggest challenge of all.
358
00:32:42,871 --> 00:32:45,205
And this time, it's personal.
359
00:32:55,024 --> 00:32:58,258
CHRIS: One of my favorite
things so see from space
is a pace that you know.
360
00:32:58,294 --> 00:33:00,361
You know, somewhere you grew up.
361
00:33:00,396 --> 00:33:03,831
The town you were born in.
362
00:33:03,866 --> 00:33:07,301
Or where you got married or
where you went on vacation.
363
00:33:07,336 --> 00:33:12,539
It's a delight to have
a memory, like a present
unwrapping itself.
364
00:33:14,043 --> 00:33:17,945
The further you get
from earth, one of the
significant problems is,
365
00:33:17,980 --> 00:33:24,084
how do we mental the mental
health of the crew when
you're so isolated from the
rest of humanity?
366
00:33:26,622 --> 00:33:31,458
NICOLE: We don't really know
how difficult it's gonna be
for humans to leave Earth.
367
00:33:31,494 --> 00:33:35,295
I mean, we're a part of earth.
368
00:33:35,331 --> 00:33:42,069
JERRY: There you are just
removed from mankind and that
distance, being off the planet,
369
00:33:42,104 --> 00:33:44,138
you feel a disconnect.
370
00:33:44,173 --> 00:33:47,908
And I'd say, you know,
I'm sort of in a prison.
371
00:33:47,943 --> 00:33:52,713
You know, I didn't do
anything wrong for sure,
but I am in a prison.
372
00:33:52,748 --> 00:33:57,818
CHRIS: If I were the commander,
heading to Mars, I would have
a talk with the crew and say,
373
00:33:57,853 --> 00:34:02,523
"Earth is now behind us.
We are now Martians."
374
00:34:09,598 --> 00:34:16,236
NARRATOR: Have they really beenliving in this 1,000 squarefoot done for over 130 days?
375
00:34:16,272 --> 00:34:22,543
After surpassing the halfwaypoint in the mission, I'mfeeling utter disbelief.
376
00:34:22,578 --> 00:34:28,048
With the nature of an isolatedand confined environment,we are effectively trapped.
377
00:34:35,724 --> 00:34:44,631
HI-SEAS stands for theHawaii Space ExplorationAnalogue and Simulation.
378
00:34:44,667 --> 00:34:49,403
We want to know how to keeppeople safe and happy in space.
379
00:34:49,438 --> 00:34:52,139
Can they stayfriends, not go crazy?
380
00:34:52,174 --> 00:34:55,909
Work well together forthe two to three years it willtake to go to the Red Planet
381
00:34:55,945 --> 00:34:57,277
and back again.
382
00:35:00,382 --> 00:35:01,782
DR. DUNN: Contact.
383
00:35:01,817 --> 00:35:04,952
Testing, one, two, three.
384
00:35:04,987 --> 00:35:09,123
ASTRONAUT: Go with
the exit protocol now.
385
00:35:09,158 --> 00:35:13,727
NARRATOR: You begin to thinkabout how harsh it is to liveon Mars, all the technology,
386
00:35:13,762 --> 00:35:16,897
all the trouble you have to gothrough just to go for a walk.
387
00:35:21,470 --> 00:35:25,439
One of the greatestchallenges to space travelisn't technical at all.
388
00:35:25,474 --> 00:35:31,044
It's the human vulnerability.
389
00:35:31,080 --> 00:35:34,314
You don't see the ocean,you don't see palm trees.
390
00:35:34,350 --> 00:35:38,485
And you just see thisblack and red lava.
391
00:35:38,521 --> 00:35:43,624
It doesn't have thedifferent gravity, thereal harsh danger of Mars.
392
00:35:46,028 --> 00:35:49,229
But it does havethe confinement.
393
00:35:49,265 --> 00:35:52,132
And it has the isolation fromyour family and friends.
394
00:35:56,605 --> 00:36:05,579
I was surprised by how much thestress affected not just how Ifelt, but how I performed.
395
00:36:05,614 --> 00:36:10,918
Being away from yourfamily can be tough,even for a week or two.
396
00:36:10,953 --> 00:36:15,889
Life on Mars is an entirelydifferent kind of separation.
397
00:36:15,925 --> 00:36:18,525
You're a pioneer.
398
00:36:18,561 --> 00:36:22,462
You're never goingto see home again.
399
00:36:22,498 --> 00:36:26,567
Everything you'll everown, you brought with you.
400
00:36:26,602 --> 00:36:29,503
The rest? You'll haveto use what you find.
401
00:36:31,840 --> 00:36:35,075
Luckily, that's somethinghumans are pretty good at.
402
00:36:35,110 --> 00:36:45,152
(music)
403
00:36:45,154 --> 00:36:54,094
(music)
404
00:37:37,606 --> 00:37:47,180
(music)
405
00:37:55,691 --> 00:38:03,797
(music)
406
00:38:17,246 --> 00:38:27,287
(music)
407
00:38:27,289 --> 00:39:06,360
(music)
408
00:39:19,575 --> 00:39:25,345
(music)
409
00:39:25,381 --> 00:39:31,084
CHRIS: We're already using
simulated Martian dust to figure
out how to build a settlement,
410
00:39:31,120 --> 00:39:33,353
somewhere besides our planet.
411
00:39:34,590 --> 00:39:37,891
So, we're definitely
taking the first step.
412
00:39:45,901 --> 00:39:51,338
NARRATOR: Even if we survivethe journey, and makethe place feel like home,
413
00:39:51,373 --> 00:39:55,642
we still might notsave our species.
414
00:39:55,677 --> 00:40:00,447
WILL: Because just
by being there, we might
turn into something else.
415
00:40:10,448 --> 00:40:15,084
CHRIS: Life tends to
naturally settle where the
conditions are best for it.
416
00:40:15,119 --> 00:40:19,755
And from orbit, you
can actually see where
we have chosen to live.
417
00:40:24,428 --> 00:40:27,963
Those patterns of human
habitation repeat themselves.
418
00:40:29,734 --> 00:40:33,969
Some parts of the world are so
desirable that there's not
enough land to support everybody
419
00:40:34,005 --> 00:40:35,938
who wants to live there.
420
00:40:35,973 --> 00:40:43,445
(music)
421
00:40:43,481 --> 00:40:49,118
We've taken nature and modified
it to make the earth more
habitable for more human beings.
422
00:40:49,153 --> 00:40:53,255
(music)
423
00:40:53,290 --> 00:40:57,826
We don't really think about
it, but we've significantly
terraformed earth.
424
00:40:57,862 --> 00:41:05,401
The farmer's fields, the
terraces, the dams we've put up.
425
00:41:05,436 --> 00:41:10,739
And when we go somewhere else,
we're going to inevitably have
to do the same thing.
426
00:41:10,775 --> 00:41:15,611
But at the same time,
we are influenced by the
environment around us.
427
00:41:15,646 --> 00:41:18,113
That shapes us.
428
00:41:18,149 --> 00:41:23,619
Your body is constantly changing
itself and adapting to best
perform in the environment
429
00:41:23,654 --> 00:41:24,987
that you put it into.
430
00:41:25,022 --> 00:41:35,064
(music)
431
00:41:35,066 --> 00:41:43,338
(music)
432
00:42:12,002 --> 00:42:17,673
NARRATOR: The Bajau livein a world of water.
433
00:42:17,708 --> 00:42:20,209
Their kids swimbefore they walk.
434
00:42:20,244 --> 00:42:30,285
(music)
435
00:42:30,287 --> 00:42:39,728
(music)
436
00:42:39,763 --> 00:42:46,268
No need for goggles or oxygentanks, their bodies havelearned to do without them.
437
00:42:46,303 --> 00:42:57,446
(music)
438
00:43:39,690 --> 00:43:42,824
The differences go deeper.
439
00:43:42,860 --> 00:43:51,033
As children, the lenses intheir eyes adapt so theirunderwater vision is twiceas sharp as ours.
440
00:43:51,068 --> 00:43:52,634
Pretty handy whenyou're hunting.
441
00:44:00,544 --> 00:44:03,345
In the short term,humans can adjust.
442
00:44:06,717 --> 00:44:10,185
In the long term...
443
00:44:10,221 --> 00:44:11,653
We evolve.
444
00:44:14,158 --> 00:44:18,193
Maybe there is a Goldilocksplanet out there, another Eart.
445
00:44:18,229 --> 00:44:21,530
If so, we'll be spendinglifetimes getting there.
446
00:44:23,000 --> 00:44:25,534
WILL: What might happen to
generations born in space?
447
00:44:25,569 --> 00:44:30,472
(music)
448
00:44:30,507 --> 00:44:35,344
CHRIS: One of the ways to test
that is to take life forms from
Earth that have a very rapid
449
00:44:35,379 --> 00:44:40,515
life cycle and take them
up to the space station
and see how they develop.
450
00:44:43,354 --> 00:44:48,490
Jellyfish have small
sensors, like hairs.
451
00:44:48,525 --> 00:44:52,394
And that lets them know about
gravity and which way's up.
452
00:44:52,429 --> 00:44:56,665
Sort of like the balance system
we have in our inner ear.
453
00:44:56,700 --> 00:45:03,705
When we took jellyfish to
the space station, they
did not develop normally.
454
00:45:03,741 --> 00:45:10,545
When they came back to Earth,
the ones born in space couldn't
tell which way was up.
455
00:45:10,581 --> 00:45:18,887
It's a sobering thought, getting
to a new home might change us in
ways we can't predict.
456
00:45:18,922 --> 00:45:24,693
I'm confident that no matter
what is thrown at us during
this incredible journey,
457
00:45:24,728 --> 00:45:27,362
we'll find a way to survive.
458
00:45:27,398 --> 00:45:31,033
But there is a cost.
459
00:45:31,068 --> 00:45:36,471
What we think of as us,
can only exist here.
460
00:45:36,507 --> 00:45:41,009
We will no longer be
earthlings when we get there.
461
00:45:41,045 --> 00:45:43,912
We will be become aliens.
462
00:45:45,516 --> 00:45:50,052
NARRATOR: Sometimesyou can only really seesomething from a distance.
463
00:45:50,087 --> 00:45:55,424
WILL: No one ever got
homesick staying at home.
464
00:45:55,459 --> 00:45:59,027
NARRATOR: Earth has beenour constant companion.
465
00:45:59,063 --> 00:46:05,634
WILL: There when the first
cell flickered to life, here
now as we turn to the stars.
466
00:46:05,669 --> 00:46:07,602
She's in our bones.
467
00:46:07,638 --> 00:46:12,708
And in our guts
and in our minds.
468
00:46:12,743 --> 00:46:15,677
NARRATOR: We may one day ventueout from our strange rock.
469
00:46:15,713 --> 00:46:20,515
(music)
470
00:46:20,551 --> 00:46:24,152
WILL: But we'll never
get the Rock out of us.
471
00:46:24,188 --> 00:46:30,826
(music)
472
00:46:30,861 --> 00:46:32,394
NARRATOR: Next time.
473
00:46:32,429 --> 00:46:35,964
How our paradise planetwas made by life.
474
00:46:35,999 --> 00:46:46,041
(music)
475
00:46:46,043 --> 00:47:02,324
(music)
45410
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