USB Missiles are fun (I shot Dvorak in the chest with one once, it did not induce a heart attack as I had hoped), but actual cannons are even more fun. This 25-inch field cannon is the closest you ...

Water is a stable chemical, but with the addition of a little electricity, it can be split into its component parts. The result is just the right mix of H2 and O2 to convert back into water with a … ...