We all have a little box in our kitchen that heats food up in minutes. But how the hell does it do that? Witchcraft? Not quite. Actually, microwaves cause water molecules in your food to move back and forth rapidly, and the resulting friction causes it to heat up.

Sure, maybe you already knew that, but in this video the engineering guy Bill Hammack explains that concept in more detail using... cheese. So even if it's not educational, it's delicious. [YouTube]