The Joe Rogan Experience
#2217 - Brian Cox
Brian Cox
And so it's only in the last, let's say, a billion years, but actually a bit less, that we've had multicellular organisms. So three quarters of it at the time were just single celled. That's even crazier. Which is one of the reasons that many people think civilizations might be rare. Because the only evidence we have is this planet.
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