PhysicsThe most precise atomic clock ever made is a cube of quantum gas The best atomic clock will only be out of sync 3.5 times in every 10 quintillion ticks. It could help test general relativity and hunt for gravitational waves ¿ìè¶ÌÊÓÆµ
PhysicsMirrored moat protects experiment searching for dark matterA vast water tank blocks unwanted particles so the XENON1T experiment in Italy can seek out elusive WIMPS – the particles that may make up dark matterRegulars