Exploring the Universe: we’re made of star stuff


Crash Course Big History #2, with John Green, takes us from the time of Big Bang and up until now, and tells us that we are made of star stuff. Actually, Carl Sagan was the first to put it that way in these exact words.

In any case, the heavy elements we see in our bodies come from supernovae as regular stars only have hydrogen, helium up to iron. It is amazing to think that the atoms that make us could be from several different stars that exploded billions of years ago. Cool, eh?

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