Jason R. Williams

Scientists used a precise laser pulse—a delta-kick—to cool molecules almost to a standstill. The molecules' internal vibrations don't mess with their motion, so they stay intact. Supercold molecules will open the door to ultra-precise tests of gravity.

Physicists turned a tiny cloud of cold atoms into a black hole mimic: inside a light-made cell, the particles streamed only one way. The reason? Their strong mutual interactions create a boundary of no return, just like an event horizon. This breakthrough could lead to microscopic circuits running o