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It's Okay to Be Smart
Are Some Species More Important Than Others?
We explore the universal rules of life that tie together Earth’s living systems. Traveling from Africa’s Serengeti plains to the nearly extinct prairies of the western U.S. to discover the unexpected species that determine the very existence of these places. Can an ecosystem survive without its keystone species? Can we restore endangered human cultures by bringing back a nearly-extinct ecosystem?
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4:20
Why do we cry? It’s weird.

5:37
Spices have special powers that make them a truly magical superfood!

5:07
Whatever you call it, flatulence, passing gas...it's natural and here's how it works.

6:24
We break down the concept of “biomass” to judge Earth’s living things from top to bottom.

5:11
Weird things happen at extreme hot and absolute cold.

7:48
Here’s the science of convergent evolution!

4:13
The origin of water traces beyond the solar system to the earliest days of the universe!

7:16
Axolotls are special salamanders because they can regenerate entire limbs!

4:59
We explore how and why itching help!

8:19
How does memory work? And how does… un-memory work?

6:35
Here’s what the 97 percent statistic *really* means.

12:46
Let’s journey back to the origin of life to explore the most important mysteries!