[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 ...

Would you believe a pendulum clock that can keep time accurately to within one second per year? If you answered “yes”, you’ve either never tried to regulate a pendulum clock yourself ...

New atomic clocks are more accurate than those used to define the second, suggesting the definition might need to change ...

The reconciliation of general relativity and quantum mechanics is one of the biggest challenges in science, one that ...