Clocks come in many styles and sizes, with perhaps the most visually pleasing ones involving marbles. Watching these little spheres obey gravity and form clearly readable numbers on a clock has strong ...

As fun as micro-controllers and RTCs are, sometimes it’s truly fascinating to see a completely mechanical clock. Using only gravity this Pendulum Marble Clock ...

Pendulum clocks, a big advance over the hourglasses and sundials humans once peered at, remained the most precise timekeeping technology until the early 1900s. Based on Galileo’s discovery that ...