how stuff works Archives

How Do Vending Machines Detect Fake Coins?

Chances are, you’ve used some type of a vending machine before. They are useful when you want a quick snack

Stackable chips are known for their distinctive concave shape, good for making an impromptu duckbill, eating as many as you can

Why do electric plugs have holes? You have seen them for years but what do they do? Stop believing the

In its 100-year history, the electric vacuum cleaner has become an indispensable home appliance for most people, and it’s obvious

From the Author: The European Space Agency offered me a seat on their zero-g plane: it’s an Airbus A310 that

From the Author: I’ve used a Combination Lock for years but I’ve never really understood how it works until I