It's Okay to Be Smart

There Was No First Human

Season 2 Episode 8 | 3m 44s

If you traced your family tree back 185 million generations, you wouldn't be looking at a human, a primate, or even a mammal. You'd be looking at a fish. So where along that line does the first human show up? The answer may surprise you

Aired: 05/01/16

Rating: NR

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