Atomic clocks are the most accurate timekeepers on the planet. Besides keeping time, they also help with GPS. How do the clocks work and what do they do for GPS? Watch the video to find out.

You’d never imagine that watching a backwards film would be interesting or entertaining, but this short film is truly fascinating. And it’s short, so enjoy.

There’s something magical about vinyl. It doesn’t sound like mp3 or CD, it sounds…different, better. Mesmerizing, in a way. When you get to see the magic happening up close and personal, it’s an even more interesting experience.

Next time you’re at a used book store, take a look around for a middle school or high school history book. U.S. History or World History, it doesn’t matter. Then turn to the section on slavery. After watching this video, those sections will seem truly pathetic.

Remember the old Charlie Daniels Band song, “The Devil Went Down to Georgia?” The ’90s and 2000s rock bad Primus covered that song in their own unique style and with a video to match.

Prepare to have your mind blown. This short piece of music seems kind of weird at first. But then you hear it backwards. And then it sounds a little cooler. And then you hear it backwards and forwards simultaneously and your brain melts just a little. And then something else happens entirely.

What is the biggest gun in the world capable of? This bad boy can launch a one ton shell as far as the eye can see. Here’s the story of the largest gun in existence.

Who on earth gives up a pregnant dog, especially one as sweet as this girl? And she’s wasn’t just kind of pregnant, she was incredibly pregnant. She gave birth two twelve adorable pups.

Don’t even try to fight the tears in this video. As soon as this chimp is released, he immediately goes and hugs Jane Goodall. You can see the emotion in both of their faces.

This ad is way better than the usual, “Be a superhero, wear a seatbelt!” nonsense. It features the entire Avengers (not the real cast, of course), and it’s actually really cute.

Bryce Dallas Howard, star of the new Jurassic Park movie, has a unique talent: she can cry on command. Conan decided to test just how well she could pull this off, so he had her cry while he made small talk about Home Depot.

“Height is just a number.” And this video will show you how true that is. At 5’1″, Jonathan Horton is the shortest man ever to complete the Ninja Warrior Wall. Of course, it doesn’t hurt that he was a competitive gymnast.