There's a simple trick to hanging a wall clock: Use your ears, not your eyes, to level it.. The ticktock of the swinging pendulum should have a smooth, even rhythm to it and not be off-beat. If you ...

Hang two pendulum clocks on the same wall, and over time, something strange will happen: the two clocks will tick in synchrony. Renowned Dutch scientist Christiaan Huygens, the inventor of the ...

[Stephen Hobley] has been experimenting with an electromagnetic pendulum in order to build himself a clock. Through the course of his experiments, he has learned quite a bit about how pendulums ...