Scientists test Einstein’s quantum challenge with one atom, directly measuring when photon paths erase interference stripes.

Einstein called it “spooky action at a distance,” but today quantum entanglement is poised to revolutionize technology from computers to cryptography. Physicists have gradually become convinced that ...

There’s nothing like a good riddle to stimulate your mind and give you an excuse to channel your inner Sherlock Holmes. Regularly doing logic and crossword puzzles can even keep your brain young as ...