Molten sodium is one of the most reactive and dangerous metals you can work with — and spinning it into a glowing sphere makes it even more extreme. This experiment looks like something from a sci-fi ...

One of the tricky things about (American) football is throwing a pass properly. If you watch a good quarterback throwing the ball, the end of the motion includes a bit of a flip that puts spin on the ...

Back on Sunday, I devoted a "Football Physics" post to talking about erratic bouncing and an amazing rugby play where a ball popped up high at just the right moment. That's the sort of play that ...