[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 ...

That big grandfather clock in the library might be an impressive piece of mechanical ingenuity, and an even better example of fine cabinetry, but we’d expect that the accuracy of a pendulum ...

“It’s similar to how pendulum clocks hanging on the same wall eventually swing in unison. But in our case, it’s atoms exchanging quantum information while experiencing different rates of ...