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It's Okay to Be Smart
How Many Trees Are There?
Season 4
Episode 25
It may be an impossible questions, but we can at least get close.
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15:15
We explore what we can actually do about pollution.
9:21
The biggest thing that has ever lived on Earth… is a tree? Hard to believe, but it’s true!
15:33
We travel to Great Sand Dunes National Park to climb the largest sand dunes in America.
12:05
There are parts of you that are living and dying at the same time. We find out how much.
12:27
This episode is about the science and evolutionary history of...butts.
