From the brains behind brains on, this is the moment of um.

Answering those questions that make you go, um, um, um, moment of um comes to you from APM Studios. I'm Bobby, the bouncy ball.

Um.

Oh boy, oh boy, oh boy, another beautiful day.

For me, every day is an honest-to-goodness gift because it means I have another full 24 hours to bounce.

As a rubber bouncy ball, bouncing is my favorite way to travel.

I bounce everywhere, up the stairs, down the stairs, across the room, into the kitty litter box, and...

Oh, wait, oh, oh, oh, oh.

Scratch that last one. Not a great place for bouncing.

Anyway, like I was saying, bouncing can take you literally anywhere.

I bet I could bounce across the entire planet if I wanted to.

But hang on, isn't the Earth round like a big beautiful bouncy ball?

So then why does it look flat from where I'm sitting?

My buddy Charles was just asking about this.

Hello, my name's Charles. I'm from Tarsen City, Nevada. And why is the Earth so flat?

But in outer space, it's a circle.

This is a wonderful question.

I love that you've used your eyes,

but perhaps you don't quite believe what they're telling you.

That's really thinking like a scientist.

My name is Ian Hall. I'm an astrophysicist from the UK.

Now, it's because we can't see enough of the earth with our eyes to see its curvature, usually.

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