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Psst, Smarty Pants. Hear that? That could be the opening stumps and claps from the rock song,

We Will Rock You by The Rock Band Queen. Or it could be the sound of rocks from space smashing

into Earth. What? That's right. There are literally millions of giant, irregularly-shaped rocks

swirling around our solar system. And every so often, an object will break free and we will, we will get

rocked by you. These rocks, known as asteroids, hit Earth all the time. Sometimes it's

hardly noticeable. Sometimes it causes a sonic blast powerful enough to shatter windows,

and injure people like the asteroid strike in Russia in 2013. And sometimes it completely changes

the planet, wiping out entire species like the asteroid that caused the dinosaurs to go extinct

65 million years ago. Nobody Dinos sought it coming.

But what are asteroids and where do they come from? What causes them to break free of their orbit

and attack Earth? And could what happened to the dinosaurs happen again?

It's time for another whiff of science on.

Who smart is it you? Is it me? Is it science? Or history? Listen up!

Everyone, we make smart and lots of fun on who smart and-

As you may know, our solar system consists of one sun, eight planets,

several dwarf planets, and lots and lots of rocks.

These rocks, or asteroids, can be found throughout the solar system,

...