In 1939, scientists discovered that peeling Scotch tape in the dark produces a visible blue glow due to a build-up of electrical charge and the sudden tearing of the adhesive. The phenomenon, known as ...

Basketball shoes on a gym floor, bicycle brakes in need of a tune-up, or the squeal of tires are everyday examples of squeaking sounds. Such sounds have long been attributed to stick-slip friction, or ...

Could you build an air-powered canon to launch a baseball faster than the speed of sound? Apparently, the answer is "yup." Check out this build from Smarter Every Day on YouTube. It's pretty awesome.

Scientists from Queen Mary University of London, the University of Cambridge, and the Institute for High Pressure Physics in Troitsk have discovered the fastest possible speed of sound. The upper ...