[Stephen Hobley] has been experimenting with an electromagnetic pendulum in order to build himself a clock. Through the ... moving without the need for chains and weights, which are typically ...

The clock is known as a Postman's Alarm. It is decorated with a painted hunting scene and dates from the 1840s. It chimes on the hour and has an 8 day movement. The chains and weights would hang ...

What we’re perhaps less used to seeing is a clock that uses chains and sprockets, and that looks more like what you’d find on a bicycle on your typical bicycle. We can’t recall seeing ...

What is the molecular clock? Levels of molecular variation could be used, in principle, to estimate divergence times, serving as evolutionary "clocks" that "tick" at different rates. Subsequent ...