Taking inspiration from Leonardo da Vinci's studies of friction, the 'sneaker squeak' question cuts to a deep problem in physics.

The forces that cause sneakers to squeak also create mini-earthquakes (shoe-quakes, if you will) and tiny lightning bolts.

An altercation near a San Francisco high school ended with several students and staff members being pepper-sprayed Wednesday afternoon, authorities said. An altercation near a San Francisco high ...

Scientists have successfully modeled large lightning strikes that occur on a kilometer scale in a lab setting of only a few ...