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Are We All Related?

Are We All Related?

Season 5 Episode 16
6:06
Why Do Fireflies Have Blinky Bottoms?

Why Do Fireflies Have Blinky Bottoms?

Season 5 Episode 23
4:22
How Do Glaciers Move?

How Do Glaciers Move?

Season 5 Episode 26
6:30
When Is It Winter On Other Planets?

When Is It Winter On Other Planets?

Season 5 Episode 29
5:00
How Poop Shapes the World

How Poop Shapes the World

Season 5 Episode 30
3:34
Do You Really Have Two Brains?

Do You Really Have Two Brains?

Season 5 Episode 33
4:20
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It's Okay to Be Smart

Why Are We The Only Humans Left?

Season 5 Episode 14

In part 2 of our special series on human ancestry, we ask why we are the only surviving branch on the human evolutionary tree. Just 50,000-100,000 years ago, Earth was home to three or four separate human species, including our most famous cousins: the Neanderthals. New research has shown that Neanderthals were not the brutish, unintelligent cavemen that cartoons make them out to be.

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Season
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6:28
How will we do a Green Revolution 2.0?
Can Trees Really Fight Climate Change?
10:44
Can trees really save us from climate change?
Could You Be a Chimera? (ASL)
9:43
Could You Be a Chimera?
This Could Change the Future of Space Travel
11:30
I went to NASA in Houston to talk to astronaut Don Pettit.
The Strange (Unexpected) Reason Ice is Slippery
7:20
Why is ice slippery? It's a more complicated answer than it seems!
Recycling Is Broken. Here’s How We Can Fix It.
11:11
Recycling is broken. Here's how we can fix it.
I Tried Eating Bugs… Here's What I Learned
14:55
People say insects are the food of the future.
Evolution Fails in the Human Body
11:53
Here’s a rundown of a few of the human body’s biggest evolutionary fails!
This Face Changes the Human Story
13:11
Meet your cousin: Homo naledi.
What If We Could See Nature In Infrared?
8:51
Why are trees and other plants green? The answer is full of surprises.
What Color Is A Banana?
8:46
How do we see color in the first place?
What’s In a 20,000 Year-Old Cube of Ice?
11:20
Earth’s climate is changing in a big way.
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