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WILL SMITH:
When I was little,
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my grandmother
gave me an old compass.
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She wanted me
to know where I was going.
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00:00:22,923 --> 00:00:27,461
I was always much more
intrigued by where we came from.
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I mean, I knew she was from
Pittsburgh, but before that,
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00:00:34,102 --> 00:00:35,803
her grandmother and her
grandmother's grandmother,
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00:00:36,304 --> 00:00:38,772
where did they come from?
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You go back far enough and
everyone, every living thing,
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00:00:43,811 --> 00:00:46,714
we all come from
the same place,
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00:00:46,747 --> 00:00:49,750
a moment when a
dead rock came to life.
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Only a few of us have
been able to see just how
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00:00:55,556 --> 00:00:57,958
extraordinary life is.
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00:00:58,259 --> 00:01:00,060
MAN (over radio):
Ignition and lift-off.
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00:01:01,795 --> 00:01:04,298
WILL SMITH: Eight astronauts,
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with over 1,000
days in space between them,
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00:01:07,735 --> 00:01:11,405
can tell us how
being up there helped
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00:01:11,439 --> 00:01:14,175
them to truly understand
what goes on down here.
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MIKE: I look down and I
can see where we came from.
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This living,
breathing bubble of life
in the blackness of space.
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CHRIS: It's hard to imagine
anywhere else where everything
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00:01:29,823 --> 00:01:31,959
could have fallen
into place so magically.
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MAE: We're so used to life
that we start to think of life
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as being really
simple and easy to do.
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It's not.
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00:01:48,476 --> 00:01:51,145
-We may never know exactly
how life got started,
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00:01:52,313 --> 00:01:54,348
but we do know it
was a strange brew.
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00:01:56,317 --> 00:01:58,719
A dash of magical liquid...
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00:02:00,654 --> 00:02:03,491
A sprinkle of stardust...
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00:02:06,527 --> 00:02:09,530
And a crackle of energy.
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Mixed together in
a big bubbling cauldron to
make our rock come alive.
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♪ ♪
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Mae Jemison sees life
differently from most of us...
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And not just because
she's an astronaut.
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00:02:58,379 --> 00:03:01,114
MAE (over radio): Go on
my mark, three, two, one...
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00:03:02,082 --> 00:03:04,485
MAN (over radio):
Okay Mae, we copy.
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WILL SMITH: She's also a doctor.
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00:03:07,588 --> 00:03:10,724
She's spent her
life studying life.
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00:03:16,297 --> 00:03:18,332
MAN (over radio):
Houston now controlling.
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00:03:18,366 --> 00:03:20,368
Houston, Endeavour
switching into roll.
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00:03:20,401 --> 00:03:22,970
Roger roll Endeavour.
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00:03:23,271 --> 00:03:26,106
-At an age when I was just
running around writing rhymes
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00:03:26,139 --> 00:03:29,543
in Philly, she was pondering
life's biggest questions.
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MAE: As a child I was fascinated
by the question, who am I?
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00:03:36,950 --> 00:03:39,152
What am I?
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00:03:41,922 --> 00:03:45,125
I remember once when we
were driving from Chicago to
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Alabama we stopped on the side
of the road and I looked up
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00:03:50,431 --> 00:03:53,734
and there was this
incredibly star-studded sky.
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00:03:57,671 --> 00:04:01,275
It just made the whole
universe very magical.
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00:04:04,778 --> 00:04:08,582
And 30 years later, I had
a ringside seat to the stars.
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00:04:14,855 --> 00:04:18,559
When I was in space, I felt
an incredible connection to the
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rest of the universe.
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00:04:24,197 --> 00:04:26,667
And it's true.
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00:04:26,700 --> 00:04:29,503
We're made of the
stuff of stars.
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00:04:30,203 --> 00:04:33,206
The carbon, the
nitrogen, the oxygen,
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00:04:35,275 --> 00:04:40,848
the elements that are the key
components to our body were
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00:04:40,881 --> 00:04:44,718
actually generated inside
of stars that exploded.
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00:04:51,659 --> 00:04:55,496
All of the stardust
scattered across the universe,
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00:04:55,896 --> 00:04:59,800
clumping together into
rocks to form planets like ours.
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00:05:04,171 --> 00:05:08,676
And the great mystery
of Genesis is about
how stardust came to life.
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00:05:17,184 --> 00:05:22,289
-You, me, the dog, we're all
made of the same dead dust
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00:05:22,322 --> 00:05:24,458
that built the planet.
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00:05:24,492 --> 00:05:27,528
It's just mixed up different.
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00:05:31,198 --> 00:05:33,501
The big mystery is,
what's the mixer?
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00:05:47,948 --> 00:05:50,418
♪ ♪
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00:05:50,451 --> 00:05:55,689
-Lechuguilla is probably
one of the most difficult
places to visit on Earth.
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00:06:04,097 --> 00:06:09,102
♪ ♪
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00:06:14,908 --> 00:06:18,579
When you're deep
in Lechuguilla you're more
than 1000 feet underground.
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00:06:24,618 --> 00:06:30,390
Lechuguilla cave is almost 150
miles long which makes it one
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00:06:30,424 --> 00:06:32,560
of the most complex
maze caves in the world.
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00:06:41,835 --> 00:06:44,605
BARTON: The trail's down here.
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00:06:54,014 --> 00:06:56,984
♪ ♪
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00:06:57,017 --> 00:06:59,553
It's a big pretty big
drop-off into this room.
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00:06:59,587 --> 00:07:01,589
Got it.
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00:07:10,864 --> 00:07:16,537
♪ ♪
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00:07:18,105 --> 00:07:22,843
That's amazing. Absolutely.
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00:07:31,885 --> 00:07:37,457
♪ ♪
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00:07:40,327 --> 00:07:44,732
Most of these formations
are a couple of hundred
thousand years old.
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00:07:45,132 --> 00:07:46,867
We'd better not
touch anything.
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00:07:46,900 --> 00:07:49,803
-Yeah, let's get through
without touching anything.
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00:08:05,385 --> 00:08:09,056
WILL SMITH: You'd
imagine these deep
dark caves to be lifeless.
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00:08:09,723 --> 00:08:12,926
There's no energy
from the sun here,
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00:08:13,393 --> 00:08:17,598
but the cave walls are
not as dead as they seem.
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00:08:28,408 --> 00:08:30,944
If you were to put
on special glasses...
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00:08:33,881 --> 00:08:37,685
You'd see this
kaleidoscope of organisms,
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00:08:37,718 --> 00:08:41,021
living in the caves.
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00:08:42,189 --> 00:08:44,758
Billions of bacteria on
every surface you look at.
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00:08:49,396 --> 00:08:52,532
Lechuguilla is cut
off from the surface.
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00:08:52,566 --> 00:08:56,203
But there is something
above all else that
is essential for life.
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00:08:58,906 --> 00:09:01,575
Water.
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00:09:07,648 --> 00:09:11,351
It takes up to 10,000 years
for water to work from the
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00:09:11,384 --> 00:09:13,821
surface into the lake.
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00:09:17,257 --> 00:09:20,227
You take the water out
of the equation and you have
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no bacteria in the cave.
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00:09:25,232 --> 00:09:28,501
MAE: Water is
required for life as we
know it here on Earth.
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00:09:38,979 --> 00:09:43,083
♪ ♪
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00:09:43,116 --> 00:09:46,053
One of the
important things you learn in
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00:09:46,086 --> 00:09:48,622
medicine is that bacteria
are made up of just one cell.
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00:09:52,693 --> 00:09:55,595
And cells are the
basic units of life.
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00:09:57,030 --> 00:10:00,100
Tiny bubbles or membranes
filled with water.
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00:10:04,171 --> 00:10:07,207
Floating around this
solution, we've got the
ingredients of life.
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00:10:12,479 --> 00:10:15,816
Yet, it all depends on water.
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00:10:28,028 --> 00:10:31,098
And when looking at
our planet from space,
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00:10:31,131 --> 00:10:35,168
I was struck by just
how much water there is.
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00:10:40,874 --> 00:10:44,311
CHRIS: It is definitely
the blue planet.
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00:10:44,577 --> 00:10:47,214
These bodies of water are
massive around the Earth.
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00:10:50,884 --> 00:10:53,053
MIKE: You're over the
ocean, ocean, ocean,
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00:10:53,086 --> 00:10:57,357
and then you hit a continent
like Africa, like, ooh,
Africa, big continent.
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00:10:57,390 --> 00:10:58,959
In just a couple
of minutes it's gone and
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00:10:58,992 --> 00:11:01,594
you're over the ocean again.
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00:11:01,929 --> 00:11:04,631
MAE: Looking at the
Nile Delta from space,
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00:11:04,664 --> 00:11:08,201
you can see how
important water is,
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00:11:08,736 --> 00:11:12,706
because all along
the Nile river is
this thin beautiful
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green strip of life.
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00:11:19,246 --> 00:11:22,950
JERRY: That H2O is
magic, and so when
you're looking for life,
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00:11:23,416 --> 00:11:26,920
the key is to find water.
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00:11:27,888 --> 00:11:30,690
-We can last
way longer without eating
than we can without drinking.
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00:11:32,425 --> 00:11:33,827
Food gives us energy.
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00:11:33,861 --> 00:11:36,296
What does water give us?
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00:11:39,432 --> 00:11:43,971
Turns out that plain
old H2O is the universal
champ at one crucial thing.
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00:11:55,048 --> 00:12:00,821
♪ ♪
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00:12:10,130 --> 00:12:16,003
♪ ♪
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00:12:25,946 --> 00:12:31,484
♪ ♪
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00:12:34,087 --> 00:12:36,056
(inaudible).
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00:12:36,089 --> 00:12:39,592
-We've come here
to Angel Falls to
climb this huge overhang.
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00:12:43,463 --> 00:12:45,632
One of the
biggest in the world.
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00:12:51,038 --> 00:12:53,640
You just feel like
you're flying when you're
hanging from the wall.
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00:12:58,178 --> 00:13:01,949
The sound of the waterfall
is like a constant storm.
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00:13:15,162 --> 00:13:17,030
(raging water)
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00:13:26,006 --> 00:13:28,108
♪ ♪
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00:13:28,141 --> 00:13:32,212
Climbing Angel Falls
is very dangerous.
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00:13:32,245 --> 00:13:33,613
-I want to keep climbing.
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00:13:33,646 --> 00:13:35,015
-You want to take the lead?
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00:13:35,048 --> 00:13:37,317
-Yeah. Of course.
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00:13:39,486 --> 00:13:43,356
-Where the rock has
been more exposed to
the water...
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00:13:45,692 --> 00:13:47,995
The Rock is crumbly.
136
00:13:49,396 --> 00:13:52,499
-It's very sandy, so I'm going
to put one protection here.
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00:13:54,234 --> 00:13:56,836
Got to be really
careful in this, you know.
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00:13:59,272 --> 00:14:01,674
-And the other hand,
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00:14:02,042 --> 00:14:04,344
where there is
no water at all,
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00:14:04,377 --> 00:14:07,180
you can see the rock
is completely different.
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00:14:07,214 --> 00:14:09,782
(inaudible).
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00:14:11,618 --> 00:14:13,553
It's extremely hard.
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00:14:13,586 --> 00:14:15,388
-Are you going to
climb (inaudible)?
144
00:14:15,422 --> 00:14:17,790
-Yeah, I will try.
145
00:14:26,934 --> 00:14:30,570
-When you get to
see this landscape from above...
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00:14:36,609 --> 00:14:39,712
You can see how the water
is a big destroyer in a way.
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00:14:43,250 --> 00:14:46,753
It dissolves the rocks.
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00:14:52,825 --> 00:14:56,964
It continues, the flow of
water, for millions of years,
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00:14:57,330 --> 00:15:01,568
like these incredible
islands in the sky.
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00:15:11,844 --> 00:15:17,684
♪ ♪
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00:15:28,195 --> 00:15:30,530
MAE: Water has
special properties.
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00:15:33,933 --> 00:15:37,837
You know the
same water we drink can
dissolve almost anything.
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00:15:40,440 --> 00:15:43,276
It will even dissolve
rock over time.
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00:15:46,946 --> 00:15:49,349
So that means lots of
different molecules can be
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00:15:49,382 --> 00:15:50,950
mixed together in it.
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00:15:52,852 --> 00:15:56,023
And interact with one
another, making something new.
157
00:16:01,995 --> 00:16:04,564
And that's what makes
Earth so special.
158
00:16:06,299 --> 00:16:08,968
With all the
liquid water we have,
159
00:16:09,002 --> 00:16:12,639
our planet's like some type
of giant chemistry lab.
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00:16:15,542 --> 00:16:18,511
Water takes dust
from the stars,
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00:16:18,545 --> 00:16:20,980
breaks it down
and shakes it up.
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00:16:21,248 --> 00:16:23,650
But life isn't going to bubble
up just because you stirred up
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00:16:23,683 --> 00:16:25,652
some muddy stardust.
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00:16:25,685 --> 00:16:28,155
If you want to brew
the soup of life,
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00:16:28,188 --> 00:16:29,589
you need to kick
it up a notch.
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00:16:41,101 --> 00:16:43,070
WILL SMITH: If you want to
make stardust into life...
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00:16:47,907 --> 00:16:50,343
There's a bit more to
it than, just add water.
168
00:16:53,946 --> 00:16:56,549
A recipe is more than
a list of ingredients.
169
00:16:57,384 --> 00:16:59,452
It also tells you how to
put them all together.
170
00:17:06,793 --> 00:17:09,262
MAE: Imagine a big pot
of all these ingredients,
171
00:17:10,029 --> 00:17:13,266
you throw them in, but if
you throw in the celery,
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00:17:13,300 --> 00:17:18,538
tomatoes and the pepper,
you're not gonna get a
173
00:17:18,571 --> 00:17:21,374
spaghetti sauce, unless
you add some heat.
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00:17:30,783 --> 00:17:36,723
♪ ♪
175
00:17:52,172 --> 00:17:55,808
-I usually start my day
with a hit of caffeine,
176
00:17:55,842 --> 00:17:59,646
but Lee Koon Yau,
his job gives him all
the jolt he needs.
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00:18:40,853 --> 00:18:47,394
♪ ♪
178
00:19:02,909 --> 00:19:05,912
(thunder)
179
00:19:18,325 --> 00:19:22,262
-Lee is up top to check
the lightning conductor.
180
00:19:35,375 --> 00:19:39,078
(singing in
native language)
181
00:19:42,715 --> 00:19:46,386
He's testing it to make
sure it conducts electricity
right down to the ground.
182
00:20:44,444 --> 00:20:47,580
WILL SMITH: You
and I may only see
lightning a few times a year,
183
00:20:48,180 --> 00:20:50,850
but the Earth
is constantly
crackling with energy.
184
00:20:52,118 --> 00:20:55,187
To see it, you have to go
way higher than a skyscraper.
185
00:20:59,626 --> 00:21:01,861
MAE: Viewed from space,
the Earth is dynamic.
186
00:21:05,197 --> 00:21:08,134
It's full of energy.
187
00:21:09,135 --> 00:21:13,640
I remember seeing these
big flashes of light that sort
of come through the clouds.
188
00:21:19,446 --> 00:21:21,914
JERRY: You know,
the lightning just
propagates literally for
189
00:21:21,948 --> 00:21:23,650
thousands of miles across
the surface of the Earth.
190
00:21:27,387 --> 00:21:29,188
NICOLE: It looks like its
nervous system spreading
191
00:21:29,221 --> 00:21:31,558
across the planet.
192
00:21:33,493 --> 00:21:36,095
MIKE: They're spectacular.
193
00:21:36,128 --> 00:21:39,399
They almost seem to be
communicating to each other.
194
00:21:43,069 --> 00:21:45,838
MAE: There are over 100
lightning strikes per second.
195
00:21:46,873 --> 00:21:49,876
That's eight million a day.
196
00:21:55,081 --> 00:21:57,850
And at the start of our
planet, billions of years ago,
197
00:21:57,884 --> 00:22:00,186
there was even more
energy on display.
198
00:22:10,397 --> 00:22:13,032
That's what life
needed to get started.
199
00:22:13,065 --> 00:22:15,334
Energy.
200
00:22:21,674 --> 00:22:24,511
The first experiment to
reveal this really captivated
201
00:22:24,544 --> 00:22:26,913
me as a child.
202
00:22:29,015 --> 00:22:31,751
I grew up in Chicago and two
scientists from my hometown
203
00:22:32,952 --> 00:22:36,723
Urey and Miller, took the
components that were believed
204
00:22:36,756 --> 00:22:39,592
to be Earth's primitive
lifeless atmosphere.
205
00:22:40,727 --> 00:22:43,530
Then they subjected it
to electrical charges.
206
00:22:47,934 --> 00:22:50,970
They were able to generate
organic molecules.
207
00:22:52,772 --> 00:22:55,542
The basic building
blocks of life.
208
00:22:57,910 --> 00:23:01,180
The thought that energy
could make lifeless stuff
209
00:23:01,213 --> 00:23:04,651
come alive was just
about as exciting as
life could get for me.
210
00:23:05,718 --> 00:23:09,055
I mean, wow.
211
00:23:10,457 --> 00:23:13,560
Now we have a lot more
knowledge about early Earth.
212
00:23:17,096 --> 00:23:19,932
Billions of years ago, there
were many more sources of
213
00:23:19,966 --> 00:23:22,001
energy than just lightning.
214
00:23:26,338 --> 00:23:28,608
Meteors rained down.
215
00:23:30,777 --> 00:23:33,412
There were volcanic eruptions.
216
00:23:37,183 --> 00:23:41,754
Super-tides
churned these seas.
217
00:23:43,923 --> 00:23:47,159
The Earth was a much more
energy-rich, violent place.
218
00:23:48,661 --> 00:23:50,396
Very lively, right?
219
00:23:50,429 --> 00:23:53,533
Lots of things are happening.
220
00:23:53,833 --> 00:23:56,936
But out of this
lifeless system,
221
00:23:57,303 --> 00:24:00,973
and over a long period of
time, we actually got life.
222
00:24:03,209 --> 00:24:06,345
And one of the best contenders
for where life started is a
223
00:24:06,378 --> 00:24:10,216
place we might believe nothing
could ever survive at all.
224
00:24:12,719 --> 00:24:14,921
Deep on the floor
of the oceans,
225
00:24:14,954 --> 00:24:17,890
something very
mysterious happens.
226
00:24:23,162 --> 00:24:26,566
Cracks in the Earth's
crust open up down there.
227
00:24:34,073 --> 00:24:36,876
And heated water
and gases spew out.
228
00:24:39,712 --> 00:24:42,248
Hydrothermal vents.
229
00:24:45,852 --> 00:24:48,521
Chemicals, energy, water.
230
00:24:48,855 --> 00:24:51,824
All in one place.
231
00:24:56,162 --> 00:24:59,832
Some are even cooking up
organic molecules today,
232
00:25:00,099 --> 00:25:02,001
life's building blocks.
233
00:25:02,034 --> 00:25:05,337
And that's why many scientists
believe it's someplace like
234
00:25:05,371 --> 00:25:08,174
this where life first started.
235
00:25:13,179 --> 00:25:15,915
-So the origin of
all of us, all the way back,
236
00:25:17,449 --> 00:25:21,120
was fired out of a chimney
at the bottom of the ocean.
237
00:25:23,189 --> 00:25:25,925
But it would have been nothing
more than hot mud if there
238
00:25:25,958 --> 00:25:29,562
wasn't one very special
element in that stardust.
239
00:25:42,041 --> 00:25:44,376
MAE: Space offers an
incredible platform to study
240
00:25:45,444 --> 00:25:47,880
life as it evolved
here on Earth.
241
00:25:49,548 --> 00:25:52,819
It's fascinating to think
that for us to be here now,
242
00:25:53,620 --> 00:25:55,922
the right combination
of stardust,
243
00:25:55,955 --> 00:25:57,924
energy and water had
to come together.
244
00:26:01,628 --> 00:26:03,562
And not just any
bit of stardust...
245
00:26:07,299 --> 00:26:09,335
When you look at life
in its most basic form,
246
00:26:10,436 --> 00:26:13,439
you find that there's one
element that acts like a
247
00:26:13,472 --> 00:26:15,341
backbone and holds
it all together.
248
00:26:17,076 --> 00:26:19,946
And you only get to see
how important it is for
249
00:26:19,979 --> 00:26:22,281
life when you
encounter death.
250
00:26:37,997 --> 00:26:40,099
WILL SMITH: For
the Hindus of Bali,
251
00:26:40,132 --> 00:26:43,602
death is a part of
the cycle of life.
252
00:26:45,137 --> 00:26:48,174
Not the end.
253
00:26:59,018 --> 00:27:01,587
♪ ♪
254
00:27:01,620 --> 00:27:04,456
It's up to all the
members of the family to
255
00:27:04,490 --> 00:27:07,960
make sure the spirits of the
dead get to the right place.
256
00:27:53,505 --> 00:27:56,743
-They burn the bodies to
return the elements of the
257
00:27:56,776 --> 00:28:00,446
universe back to their source.
258
00:28:07,754 --> 00:28:09,255
The goal?
259
00:28:09,288 --> 00:28:12,058
To convert the body into ash.
260
00:28:24,370 --> 00:28:27,039
MAE: When you burn
something that was once alive,
261
00:28:27,073 --> 00:28:32,211
and drive off all the water,
what emerges in the flame is
262
00:28:33,579 --> 00:28:36,648
the essential bit of stardust
that makes life possible.
263
00:28:39,251 --> 00:28:41,553
That charred black
stuff, carbon.
264
00:28:43,823 --> 00:28:46,092
Everything is our
body has carbon in it.
265
00:28:46,658 --> 00:28:51,463
From our bones to our muscle
to our neuro-receptors.
266
00:28:58,170 --> 00:29:02,341
It might be hard to
understand what makes
carbon so great for life,
267
00:29:03,442 --> 00:29:06,779
but it turns out
that carbon is the
ultimate building block.
268
00:29:09,248 --> 00:29:11,918
It can connect with other
elements in almost infinite
269
00:29:11,951 --> 00:29:16,155
ways to generate all the
different molecules needed to
270
00:29:16,188 --> 00:29:18,324
create a living cell.
271
00:29:24,163 --> 00:29:27,666
-Carbon is like the coolest
Lego brick you can imagine.
272
00:29:29,135 --> 00:29:30,937
My kids loved playing
with this stuff,
273
00:29:32,038 --> 00:29:34,841
but if carbon was
one of those blocks,
274
00:29:34,874 --> 00:29:37,109
it'd be the one that
they'd all fight over,
275
00:29:37,944 --> 00:29:40,246
because you can snap
it together just about
276
00:29:40,279 --> 00:29:42,014
any way you like.
277
00:29:44,683 --> 00:29:46,853
Take something with a
lot of carbon in it.
278
00:29:52,191 --> 00:29:54,026
Spider silk.
279
00:30:04,036 --> 00:30:09,508
♪ ♪
280
00:30:17,249 --> 00:30:21,653
Now spider silk is finer than
hair, stronger than steel,
281
00:30:24,356 --> 00:30:27,693
stretchy as elastic
and sticky as gum.
282
00:30:33,866 --> 00:30:36,302
All of those qualities
just depend on how you snap
283
00:30:36,335 --> 00:30:38,770
together that carbon.
284
00:30:44,276 --> 00:30:46,913
MAE: Carbon's versatility
enables a construction of a
285
00:30:47,346 --> 00:30:51,683
miraculous molecule inside
nearly every living cell.
286
00:30:54,053 --> 00:30:56,288
DNA.
287
00:31:00,059 --> 00:31:03,629
Our DNA is one of the
most complex molecules
in the entire universe.
288
00:31:08,968 --> 00:31:13,739
Billions of carbon
atoms combined to
help hold it together,
289
00:31:16,375 --> 00:31:22,214
and this beautifully
tangled formation is like
an organic super-computer.
290
00:31:26,618 --> 00:31:29,922
It contains the instruction
manual for life.
291
00:31:31,457 --> 00:31:36,162
And every facet
and every detail
that makes you, you.
292
00:31:42,969 --> 00:31:46,072
And it's not just us humans.
293
00:31:46,105 --> 00:31:49,675
DNA is at the heart
of almost every living
cell that ever existed.
294
00:31:54,013 --> 00:31:57,483
And you couldn't build
it without carbon.
295
00:32:00,452 --> 00:32:03,122
-Now hang on a sec,
something doesn't add up,
alright.
296
00:32:03,489 --> 00:32:05,958
I'm no scientist
but growing up,
297
00:32:05,992 --> 00:32:09,228
I made a lot of instant
noodles and I'll tell you one
298
00:32:09,261 --> 00:32:13,665
thing, if you take your flavor
packet and throw it into a
299
00:32:13,699 --> 00:32:16,868
swimming pool, you
are not going to get
a nice bowl of ramen.
300
00:32:18,270 --> 00:32:22,774
So how are you
supposed to make DNA in the
middle of an endless ocean?
301
00:32:31,217 --> 00:32:33,785
WILL SMITH: Take a pinch
of star, splash of water,
302
00:32:34,620 --> 00:32:37,223
turn up the heat and bam.
303
00:32:38,624 --> 00:32:42,161
Happy Birthday Life.
304
00:32:44,130 --> 00:32:45,797
Not quite.
305
00:32:45,831 --> 00:32:48,534
There's still something
missing from our recipe.
306
00:32:48,567 --> 00:32:50,302
The pot you cook it all up in.
307
00:32:51,970 --> 00:32:54,640
Everything alive needs to be
held together and protected.
308
00:32:56,142 --> 00:32:59,211
That's true if you're
a strand of DNA...
309
00:33:00,912 --> 00:33:02,548
Or an astronaut.
310
00:33:10,689 --> 00:33:13,559
CHRIS: The space station
is like a cell in a way.
311
00:33:13,592 --> 00:33:15,827
It's like a bubble of life.
312
00:33:17,863 --> 00:33:21,867
JEFF: You really have this
sense of being enclosed,
313
00:33:23,335 --> 00:33:26,705
you know, just a few
inches in front of my eyes
314
00:33:26,738 --> 00:33:30,076
is the vacuum of space,
and if I were out there,
315
00:33:30,109 --> 00:33:33,245
I'd be gone in 10 seconds.
316
00:33:35,514 --> 00:33:37,749
LELAND: Inside we have
all the ingredients and the
317
00:33:37,783 --> 00:33:40,186
systems to keep us alive.
318
00:33:46,525 --> 00:33:49,528
MAE: It's the same
for living cells.
319
00:33:49,561 --> 00:33:52,698
Just at a microscopic level.
320
00:33:55,934 --> 00:33:58,804
Water is a critical
solvent for life.
321
00:34:01,140 --> 00:34:03,309
But if there's
too much water...
322
00:34:05,311 --> 00:34:07,446
The solution
might be dilute,
323
00:34:08,214 --> 00:34:10,549
and the molecules
of life never
bump into one another.
324
00:34:15,954 --> 00:34:17,623
So you need something
to contain them.
325
00:34:21,493 --> 00:34:24,230
Think of a bubble
that we blow.
326
00:34:27,133 --> 00:34:32,504
That surrounds
this pocket of air.
327
00:34:34,506 --> 00:34:37,008
And it keeps the
air contained.
328
00:34:38,810 --> 00:34:42,181
There's something similar
encasing all living cells.
329
00:34:44,150 --> 00:34:46,652
Membranes.
330
00:35:07,773 --> 00:35:11,610
-The holy grail
for me is to find out
how the first membranes formed.
331
00:35:16,047 --> 00:35:18,450
It could have formed
in a hot spring,
332
00:35:18,784 --> 00:35:20,652
in an ice pool
underneath an ice sheet.
333
00:35:23,121 --> 00:35:25,824
It's a huge mystery.
334
00:35:36,067 --> 00:35:38,670
I've come to
Iceland because it's a
fantastic natural laboratory.
335
00:35:41,373 --> 00:35:43,742
This is Liane,
coming in.
336
00:35:44,142 --> 00:35:47,679
I'm heading north, I'm
at 460 meters altitude and
I'm heading to direction 71.
337
00:35:49,147 --> 00:35:50,649
It's snowing outside.
338
00:35:50,682 --> 00:35:53,585
I'll be there
in an hour. Over.
339
00:36:02,928 --> 00:36:08,700
♪ ♪
340
00:36:09,735 --> 00:36:12,704
Today in Iceland
you see volcanoes
underneath icecaps.
341
00:36:22,381 --> 00:36:25,751
You also see hot springs.
342
00:36:26,051 --> 00:36:29,521
Bubbling pools where life
could have started as well.
343
00:36:35,427 --> 00:36:37,596
Even in the hottest
environments,
344
00:36:37,629 --> 00:36:40,732
if you take a sample
and you analyze its DNA,
345
00:36:41,032 --> 00:36:43,134
there is life there.
346
00:36:49,207 --> 00:36:53,579
In the early Earth
you can envisage these
bubbling mud pools,
347
00:36:53,945 --> 00:36:55,881
where water dissolves
the rocks and makes clay.
348
00:36:59,251 --> 00:37:03,221
As the gas comes out,
it forms a membrane
which then bursts.
349
00:37:10,962 --> 00:37:13,632
So think of that membrane
not bursting and actually
350
00:37:13,665 --> 00:37:16,935
preserving at a very,
very small scale...
351
00:37:17,969 --> 00:37:21,072
And then if you mix
organic molecules inside,
352
00:37:21,106 --> 00:37:24,376
you all of a sudden have an
organic molecule inside a
353
00:37:24,410 --> 00:37:27,178
membrane to form a cell.
354
00:37:37,255 --> 00:37:41,126
♪ ♪
355
00:37:41,159 --> 00:37:43,762
MAE: Without
membranes we would
be on a planet covered
356
00:37:43,795 --> 00:37:46,432
by a dilute ocean of the
building blocks of life.
357
00:37:49,435 --> 00:37:51,637
But with membranes,
358
00:37:51,670 --> 00:37:56,542
finally there was a
way to keep all those
building blocks together.
359
00:37:59,945 --> 00:38:02,514
I believe there
were many opportunities
for life to arise.
360
00:38:06,718 --> 00:38:10,221
We may have had
other types of lifeforms
that came and went,
361
00:38:12,190 --> 00:38:13,659
but didn't take, right?
362
00:38:13,692 --> 00:38:17,062
They didn't hit and stick.
363
00:38:17,396 --> 00:38:18,897
But one of them made it.
364
00:38:28,807 --> 00:38:32,578
It's called LUCA,
which stands for the
365
00:38:33,712 --> 00:38:36,915
Last Universal
Common Ancestor,
366
00:38:38,517 --> 00:38:41,653
for all life here on Earth.
367
00:38:44,390 --> 00:38:48,494
LUCA could protect
itself with a membrane
and reproduce itself.
368
00:38:52,998 --> 00:38:56,334
Everything came together in
just the right way to create
369
00:38:56,368 --> 00:38:59,671
the first living cell,
with DNA at its heart.
370
00:39:06,878 --> 00:39:09,448
Fast forward
billions of years...
371
00:39:11,282 --> 00:39:14,853
And we find that
all life today uses the
same basic chemistry.
372
00:39:22,394 --> 00:39:28,299
And this points to one thing,
it all originated in that
first primitive cell.
373
00:39:33,772 --> 00:39:35,407
-Alright, now my grandma,
374
00:39:35,441 --> 00:39:37,576
you know, she
was kind of small.
375
00:39:37,609 --> 00:39:42,748
But LUCA, the great,
great, great times a gazillion
376
00:39:43,982 --> 00:39:48,153
grandmother of us all,
she was tinier than a dot.
377
00:39:49,955 --> 00:39:53,191
As far as we know, that
cell was the single and
378
00:39:53,224 --> 00:39:57,963
only origin of all life.
379
00:39:58,329 --> 00:40:00,499
Well, at least on Earth.
380
00:40:08,674 --> 00:40:10,976
WILL SMITH: If you check out
pretty much anywhere in the
381
00:40:11,009 --> 00:40:13,579
universe, you're going to
find the same ingredients
382
00:40:13,612 --> 00:40:15,313
to cook up life.
383
00:40:15,346 --> 00:40:17,749
They're not exotic,
they're staples.
384
00:40:18,617 --> 00:40:21,487
Now sure, mixing them
up just right is hard,
385
00:40:21,520 --> 00:40:24,322
but the universe is vast.
386
00:40:26,792 --> 00:40:30,161
So does that mean there's
a big piping hot serving
387
00:40:30,195 --> 00:40:32,363
of life somewhere
else out there?
388
00:40:33,665 --> 00:40:35,534
That's what one
group of explorers is
trying to find out.
389
00:40:37,469 --> 00:40:40,138
Hunting for strange
lifeforms, not off-planet,
390
00:40:41,640 --> 00:40:44,109
but right here,
in parts unknown.
391
00:40:50,148 --> 00:40:52,518
-There's an alien world
right beneath our feet.
392
00:41:02,494 --> 00:41:06,397
♪ ♪
393
00:41:07,032 --> 00:41:10,068
As you drop into
this blackness,
394
00:41:11,069 --> 00:41:14,540
you have no sense
that you're still on
this planet anymore.
395
00:41:38,864 --> 00:41:41,833
It can be
completely disorienting.
396
00:41:41,867 --> 00:41:44,235
You're spun around,
and which way is up,
397
00:41:44,269 --> 00:41:47,839
which way is forward,
which way is backwards.
398
00:41:52,210 --> 00:41:54,646
These underwater
caves are one of the
least understood parts
399
00:41:54,680 --> 00:41:58,717
of our planet
because of the dangers
of going down into them.
400
00:43:59,470 --> 00:44:04,275
MAE: My desire to
understand how life
began on Earth also
401
00:44:04,309 --> 00:44:08,680
reaches out to the stars,
because the ingredients for
402
00:44:08,980 --> 00:44:11,649
life probably exist
in many places.
403
00:44:13,752 --> 00:44:17,022
In our solar system, in our
galaxy and in the universe,
404
00:44:18,189 --> 00:44:20,091
stardust...
405
00:44:20,992 --> 00:44:22,527
Water...
406
00:44:22,861 --> 00:44:24,930
And energy.
407
00:44:26,932 --> 00:44:30,468
JERRY: Out there we're
finding water on different
moons that surround
408
00:44:30,501 --> 00:44:33,671
some of the planets
in our solar system.
409
00:44:36,341 --> 00:44:39,878
JEFF: The icy moons
of Jupiter and Saturn
have oceans of liquid water
410
00:44:40,411 --> 00:44:42,113
underneath the ice.
411
00:44:47,085 --> 00:44:50,355
CHRIS: Enceladus
is a water-world,
412
00:44:50,388 --> 00:44:53,859
but with a hot rocky center
and plumes of water spraying
413
00:44:53,892 --> 00:44:56,094
out into the universe.
414
00:44:57,595 --> 00:45:01,800
So maybe there's
primitive life on a
moon of Saturn right now.
415
00:45:07,105 --> 00:45:10,308
MAE: I always wondered, will
we find life on other planets?
416
00:45:12,210 --> 00:45:14,645
Will we find life outside
of our solar system?
417
00:45:16,714 --> 00:45:20,118
And as we look beyond the
Earth and explore other rocks,
418
00:45:21,152 --> 00:45:24,923
I believe that it's likely
we will find simple life.
419
00:45:28,326 --> 00:45:33,098
It'll look different, it will
be different, but our rock,
420
00:45:34,132 --> 00:45:37,668
our planet is important to us.
421
00:45:40,605 --> 00:45:43,975
It's special and it's unique
because it's our home.
422
00:45:44,843 --> 00:45:47,645
It's where we evolved.
423
00:45:54,652 --> 00:45:57,622
-Think of that fragile
moment, billions of years ago,
424
00:45:58,423 --> 00:46:00,525
where you and I and
all of us began.
425
00:46:06,798 --> 00:46:11,436
A tiny moat of life suspended
in a ripple of water.
426
00:46:13,438 --> 00:46:16,174
The promise of everything
that is alive or ever
427
00:46:16,207 --> 00:46:18,944
lived in our world.
428
00:46:19,344 --> 00:46:23,048
It's the moment nothing
turned to something.
429
00:46:23,648 --> 00:46:27,052
That stardust
sparkled to life.
430
00:46:27,718 --> 00:46:31,489
The moment one rock
in a remote corner of
the universe became
431
00:46:31,522 --> 00:46:34,225
most wonderfully strange.
432
00:46:40,131 --> 00:46:43,134
Genesis is the
bright side of life.
433
00:46:46,137 --> 00:46:49,474
Next time, life's
dark shadow...
434
00:46:50,475 --> 00:46:52,844
Death.
435
00:47:11,729 --> 00:47:12,763
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