Scientists have previously established that light can be slowed down in certain scenarios, and a new study demonstrates a method for achieving it that promises to be one of the most useful approaches yet.
Scientists have for the first time observed the early universe running in extreme slow motion, unlocking one of the mysteries of Einstein's expanding universe.
Way back in 1979, astronomers discovered that cluster's mass distribution formed a lens that distorted the light. Now EU astronomers have spotted time delaying effect with another distant quasar.
