In geometry, there are surfaces that do without an inside or outside—and some need at least four dimensions to exist ...

As mad as it sounds, mankind has been making (and therefore obsessing over) watches for 500 years. 2025 has seen all manner ...

It’s possible to defy gravity using sound waves, magnets or electricity, but today’s methods can’t hoist heavy items high in ...

Bowlers in cricket look to challenge batters with swing, seam and spin bowling. Scientists are still learning how bowlers ...

Understand rotational motion in a clear, intuitive way with a lesson designed to stick with you forever. This video breaks ...

Frotting falls under the frottage umbrella, which is all about achieving pleasure through rubbing and friction, and includes everything from dry humping to scissoring and tribbing. But frotting ...