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Android, and Echo devices. Hey, smarty pants. Close your eyes. Really, really tight.

Maybe you put your hands over them? Pretty dark, right?

Well, guess what? There's a part of the universe that's way darker,

as in the total absence of light. Whoa. Do you have any idea what I'm talking about?

Have you ever heard of a black hole? Huh? Black holes are objects in space with a gravitational force

so strong nothing can escape from it. Not even light. Which means black holes are total darkness.

But what exactly are black holes? How big do they get? And what would happen if you got too

close to one? Trust me, you don't want to. It's time for another Whiff of Science on

Who Smarted? Who Smarted? Who Smarted? Is it you? Is it me? Is it science? Or history? Listen up.

Everyone, we make smarty lots of fun on Who Smarted?

So what is a black hole? Is it A? A chocolate frosted donut hole.

Hmm, donut. B, the remnants of a collapsed star. Or C, a portal that aliens use to zip from one

end of the galaxy to another. If you said A, you're probably hungry and you could use a snack.

If you said B, you're right. Black holes are leftovers from collapsed stars.

And if you said C, aliens use them as portals. Well, you might not be wrong, but we'll get to that

in a bit. Scientists believe black holes have been around since the beginning of the universe,

and there may be billions of them out there. But astronomers weren't certain they even existed

until around 50 years ago. And they didn't get the first image of one until two years ago.

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