One man is responsible for the McDonald’s Dollar Menu, Pizza Hut’s stuffed crust, and Smashburger. Meet Tom Ryan ...

In this video I see how fast we can get a radiometer to spin by shining the world's brightest flashlight on it. Then I talk about the real reason the Crookes radiometer spins when you shine light on ...

Whether you’re a parent, older sibling, or just a curious viewer, understanding movie ratings, from PG to R, helps you ...