Gravity

Fascinating video shows how using opposing ultrasonic speakers can levitate and hold droplets of water against gravity.

Gravity waves, predicted by Einstein, have yet to be seen, but new advanced experiments are in the works.

Physicists have hunted for predicted gravitational waves without luck so far.

New findings have implications for space travel and potentially for treating neurological disorders.

Physicists have discovered a new type of gravity wave, and it's pretty odd!

Star-shaped and polygon-shaped gravity waves have been observed in liquid oil.

These invisible waves bump up against planes, leading to turbulence.

When two black holes collide they could create gravitational waves.

Running is hard on the joints, but researchers now have some solutions to this problem.

Scientists (and beer drinkers) had long wondered why the Irish stout's bubbles sink rather than rise.