There are only two requirements for a right triangle. First, it has to be a shape with three sides---the "triangle" part. Second, one of the angles must be 90 degrees.

Harnessing the physics of vertical rolling could one day be applied across soft robotics to create new machines capable of inspecting pipe interiors, exploring difficult-to-reach cave systems, ...

Scientists have discovered that under the right conditions, a gummy bear-like ball can roll down a vertical wall all by itself—upending a core assumption in physics.

Researchers from the University of Waterloo have achieved a feat previously thought to be impossible—getting a sphere to roll down a totally vertical surface without applying any external force.

Measuring Δm s is difficult because the B 0 s – B 0 s oscillations are very fast. However, last year the CDF experiment at Fermilab was able to make a remarkably precise measurement of Δm s of about 2 ...