Up Next

Meet Your Cousins: Squirrel Monkeys

2:05

Amazing Places, Amazing Fossils: Lucy

4:54

Amazing Places, Amazing Fossils: Tritheledont

4:05

The Ancient History of the Human Hand

3:52

What Can Fossil Teeth Tell Us?

1:59

We Hear with the Bones that Reptiles Eat With

0:00

Finding the Origins of Human Color Vision

4:41

The Evolution of Your Teeth

2:51

Amazing Places, Amazing Fossils: Tiktaalik

4:38

How Do We Know When Our Ancestors Lost Their Tails?

4:00

The 500-Million-Year History of the Human Brain

3:19

Ancient Hands, Ancient Tools

4:35

Your Inner Fish

Your Inner Monkey

Our primate progenitors had bodies a lot like those of modern monkeys and spent tens of millions of years living in trees. From them we inherited our versatile hands, amazing vision and capable brains — but also some less beneficial traits, including our bad backs and terrible sense of smell.

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Full Episodes

Your Inner Fish

Your Inner Reptile

Learn which parts of our bodies we’ve inherited from our reptilian ancestors.

Season 1 Episode 2

Your Inner Fish

Your Inner Fish

See how the genetic legacy of a fish can be seen today in our own DNA.

Season 1 Episode 1