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The Cheerios Effect

The Cheerios Effect

Season 5 Episode 37
5:08
The Superb Owl!

The Superb Owl!

Season 5 Episode 3
4:10
Should You Eat Everyday?

Should You Eat Everyday?

Season 5 Episode 38
4:38
How the Toilet Changed History

How the Toilet Changed History

Season 5 Episode 5
5:43
The Romantic Lure of Moonlight

The Romantic Lure of Moonlight

Season 5 Episode 40
3:46
How the Meter Became The Meter

How the Meter Became The Meter

Season 5 Episode 6
6:02
What is Luck?

What is Luck?

Season 5 Episode 8
5:10
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It's Okay to Be Smart

How Many Species Are There?

Season 5 Episode 2

How many species are there on Earth? In biology, this is one of a fundamental question that we still don’t have a very good answer for. Imagine if chemists didn’t know all the elements of the periodic table, or if physicists didn’t know all of the particles of the standard model. Knowing how many different species there are is information we need to know in order to protect the environment, but it