or a simple toy? And was it a one-off, made for a wealthy patron, or just one example of a mass-produced tool? For decades, researchers have attempted to understand how accurate the Mechanism is ...

A wheel and axle mechanism is a simple device you make when you connect ... Both the bicycle and the toy car have wheel and axle mechanisms that help them to move. So, how does this work?

The mysterious Antikythera Mechanism is 2,000 years old and has long puzzled scientists. New research into its triangle-shaped teeth may finally reveal its intended purpose.