PBS Anywhere

Providing Support for PBS.org

It’s Okay to Be Smart

Whose Air do we Share?

Video duration: 3:24

Earth's atmosphere is big, but not as big as many people think. All the air that keeps us alive is just a thin candy shell around our planet. In this episode, echoing the words of John F. Kennedy, I'll show you the science of how we all share the same air. So let's be careful about what we're putting in it.

Episodes of It’s Okay to Be Smart151

Video thumbnail: It’s Okay to Be Smart Why Salt & Pepper?

It’s Okay to Be Smart

Why Salt & Pepper?

Join the #AnythingButPepper movement!

5:23

Why Salt & Pepper?

5:23

Video thumbnail: It’s Okay to Be Smart Why Don't Other Animals Wear Glasses?

It’s Okay to Be Smart

Why Don't Other Animals Wear Glasses?

Vision impairment is common in humans, so why not the rest of the animal kingdom?

5:03

Why Don't Other Animals Wear Glasses?

5:03

Video thumbnail: It’s Okay to Be Smart Should You Be Worried About Zika?

It’s Okay to Be Smart

Should You Be Worried About Zika?

Mosquitos have been dangerous for, well... forever. So what's new about Zika?

5:45

Should You Be Worried About Zika?

5:45

See all Episodes