PhysicsWhy darkness between stars reveals more about the universe than light When looking up at the night sky, light from stars draws attention. But the darkness between the light can reveal even more about the universe, says Nobel prize-winning astrophysicist Adam Riess ¿ìè¶ÌÊÓÆµ
PhysicsQuantum watch is a 'completely new way of measuring time' A quantum stopwatch made of lasers and helium atoms can measure the time that has passed with complete accuracy, without counting seconds like other clocks ¿ìè¶ÌÊÓÆµ