The squeaking of sneakers on a gym floor is usually attributed to friction, specifically a stick-slip variety that involves cycles of sticking and sliding between two surfaces. But that model is best ...

With a simple motion, a jack-in-the-box-like spring designed at NASA's Jet Propulsion Laboratory showed the potential of additive manufacturing, also known as 3D printing, to cut costs and complexity ...

Eli Sloutskin and Alexander Butenko watched this droplet transform as they lowered and then raised its temperature. As it cools, the spherical droplet of hexadecane briefly becomes an icosahedron ...