Newton's cradle is a fabulous toy. In case you aren't familiar with this device, it usually consists of five hanging metal balls that all line up horizontally. If you pull back a ball on one end and ...

For the first time, by studying quantum correlations between triplets of secondary particles created during high-energy ...

When you shine a flashlight into a glass of water, the beam bends. That simple observation, familiar since ancient times, hides one of the oldest puzzles in physics: what really happens to the ...