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The Real "Doctor Frankenstein"

The Real "Doctor Frankenstein"

Season 2 Episode 48
6:12
The Physics of Space Battles

The Physics of Space Battles

Season 2 Episode 55
5:13
A Slice of Pizza Science!

A Slice of Pizza Science!

Season 2 Episode 51
3:32
Why Do Clouds Stay Up?

Why Do Clouds Stay Up?

Season 2 Episode 52
5:13
Why Does The Earth Have Layers?

Why Does The Earth Have Layers?

Season 2 Episode 53
4:31
Could We Clone Ourselves?

Could We Clone Ourselves?

Season 2 Episode 28
5:31
The Science of Goats!

The Science of Goats!

Season 2 Episode 47
3:35
How to See Time Travel!!!

How to See Time Travel!!!

Season 2 Episode 54
3:38
Why Do We Go to Space?

Why Do We Go to Space?

Season 2 Episode 4
2:53
Why Do Things Sound Scary?

Why Do Things Sound Scary?

Season 2 Episode 5
5:46
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It's Okay to Be Smart

There Was No First Human

Season 2 Episode 24

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