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Vsauce Tshirts:
music by:

Bill Bryson's "A Short History of Nearly Everything":

We're all related (Wikipedia):

Most Recent Common Ancestor PAPER:

Most Recent Common Ancestor data excludes uncontacted peoples:

H Twins SCALE OF THE UNIVERSE (interactive):

Our atoms get replaced:

TIME article on atom replacement (pay-gate):,9171,936455,00.html

The paradox of atom replacement and identity:

1 billion sodium atoms:

How many atoms are in our body?:

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