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It’s Okay to Be Smart

So You Want to go to Mars?

Video duration: 8:17

Can't wait to get into outer space? Well there's a bit you need to know first... Spending time in zero gravity can have some pretty extreme effects on the human body. Still scientists are already making plans for long trips to other planets, but first we have to start with a few experiments here on Earth — and it all starts with astronaut Scott Kelly spending one full year in orbit.

Episodes of It’s Okay to Be Smart82

Video thumbnail: It’s Okay to Be Smart Why Are Some People Left-Handed?

It’s Okay to Be Smart

Why Are Some People Left-Handed?

The science of their sinister ways…

5:01

Why Are Some People Left-Handed?

5:01

Video thumbnail: It’s Okay to Be Smart Why I'm Scared of Spiders

It’s Okay to Be Smart

Why I'm Scared of Spiders

The science of… OH GOD IS THAT A SPIDER?!

3:06

Why I'm Scared of Spiders

3:06

Video thumbnail: It’s Okay to Be Smart Why Does The Earth Have Layers?

It’s Okay to Be Smart

Why Does The Earth Have Layers?

…or why we live on an onion made of magma

4:31

Why Does The Earth Have Layers?

4:31

Video thumbnail: It’s Okay to Be Smart Why Do Clouds Stay Up?

It’s Okay to Be Smart

Why Do Clouds Stay Up?

There's nothing wrong with having your head in the clouds

5:13

Why Do Clouds Stay Up?

5:13

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