[00:18.830]All life is related
[00:22.270]And it enables us to construct with confidence
[00:27.310]The complex tree that represents the history of life
[00:36.270]Our planet,the Earth, is as far as we know
[00:40.670]Unique in the universe
[00:43.010]It contains life
[00:45.870]Here plants and animals proliferate in such numbers
[00:50.140]That we still have not even named all the different species
[00:54.470]Darwin's great insight revolutionized the way in which we see the world
[00:59.730]We now understand why there are so many different species
[01:03.960]Every cell is a triumph of natural selection
[01:07.870]And we're made of trillions of cells (Within us is a little universe)
[01:12.510]Those are some of the things that molecules do
[01:16.410]Given four billions years of evolution (We are, each of us, a multitude)
[01:26.060]Now how did the molecules of life arise?
[01:30.200][David Attenborough]
[01:31.050]It began in the sea
[01:32.460]Some three thousand million years ago
[01:35.220]Complex chemical molecules began to clump together
[01:40.510]These were the "seeds"
[01:41.900]From which the tree of life developed
[01:43.990]They were able to split replicating themselves
[01:46.690]As bacteria do
[01:48.780]The secrets of evolution
[01:50.900]Are time and death
[01:53.230]There's an unbroken thread that stretches
[01:55.280]From those first cells to us
[01:57.710]The secrets of evolution
[01:59.950]Are time and death
[02:02.160]There's an unbroken thread that stretches
[02:04.170]From those first cells to us
[02:07.450]Every cell is a triumph of natural selection
[02:11.220]And we're made of trillions of cells (Within us is a little universe)
[02:15.870]Those are some of the things that molecules do
[02:19.780]Given four billions years of evolution (We are, each of us, a multitude)
[02:30.680]There isn't a sharp line dividing humans
[02:34.200]From the rest of the animal kingdom
[02:36.710]It's a very wuzzie line
[02:38.700]It's a very wuzzie line
[02:41.050]And it's getting wuzzier
[02:42.600]All the time
[02:47.580]We find animals doing things that we
[02:50.430]In our arrogance
[02:52.210]Used to think was "just human"
[02:56.970]It's a very wuzzie line
[02:58.940]and it's getting wuzzier
[03:00.710]All the time
[03:06.260]Every cell is a triumph of natural selection
[03:10.030]And we're made of trillions of cells (Within us is a little universe)
[03:14.730]Those are some of the things that molecules do
[03:18.710]Given four billions years of evolution (We are, each of us, a multitude)
[03:24.620]Every cell is a triumph of natural selection
[03:28.230]And we're made of trillions of cells (Within us is a little universe)
[03:32.900]Our planet,the Earth, is as far as we know
[03:37.200]Unique in the universe
[03:39.710]It contains life
[03:41.710]Its continued survival now rests in our hands