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Do Fish Pee?

Do Fish Pee?

Season 6 Episode 36
4:53
Why Do We Itch (ASL)

Why Do We Itch (ASL)

Season 6 Episode 37
4:59
Why Don't Big Animals Get More Cancer?

Why Don't Big Animals Get More Cancer?

Season 10 Episode 2
9:42
How Illusions Can Explain Reality

How Illusions Can Explain Reality

Season 10 Episode 4
19:07
Are Humans Still Evolving?

Are Humans Still Evolving?

Season 10 Episode 5
10:41
Why You Can’t Smell Yourself?

Why You Can’t Smell Yourself?

Season 10 Episode 7
19:10
Why is Puberty so Weird?

Why is Puberty so Weird?

Season 10 Episode 10
10:00
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It's Okay to Be Smart

Does Someone Else Have Your Face?

Season 6 Episode 35

They say everyone has a doppelgänger, but is that really true? This week we meet a young woman who found her own look-alike, and figure out how we actually recognize faces.