Mark Hamill and Heath Ledger both had two entirely different interpretations of the Joker. It’s amazing to hear Mark Hamill’s opinion of Ledger’s––and then to hear Hamill say, “Why so serious?” his Joker voice.

Besides teaching kids about the wonders of science, Bill Nye has also become something of a pseudoscience debunker. Here he is taking down one of those people who think the moon landing didn’t happen.

When dinosaurs walked the earth––the very phrase can set your spine tingling. This video gives you a brief historical primer on that amazing period of time.

Here’s a new twist on playing airsoft. Dress a dude up in body armor and give him a minigun that fires airsoft pellets. It may not be easy to stop him, but it sure makes for an interesting game.

This poor cat can’t quite figure out how this mouse pop-up toy works. Fortunately for the cat a dog comes along to save the day.

Fans of Kitchen Nightmares know this sound, even if they don’t know. As this somewhat surreal video shows, Kitchen Nightmares loves one particular sound effect.

In science fiction movies, people are always traveling at light speed. But is it that easy? This video looks at all the various technical difficulties of traveling at light speed.

What’s so exciting about a moving picture in the age of smartphones and tablets? The moving picture in this illusion is an actual photograph. And there’s more, but we won’t ruin the surprise.

This puppeteer brings new meaning to the Metallica song “Master of Puppets.” Watch this puppeteer turn his puppet Pantera guitarist to life.

Fat Joe and Big Pun were at a seedy club and carelessly got into an argument with a group of big, bad bouncers. Right before they were about to get the snot beat out of them, Mike Tyson shows up to save the day.

NBA legends Gary Payton and Glen Rice simply lost their minds when they saw this random dude dunk. But that’s nothing compared to how they reacted when he dunked over two people.

When you stretch a rubberband, it heats up. When you release the tension, it cools. Using this idea, the scientist in this video built a refrigerator.