The Quest to Crystallize Time
Time crystals are hypothetical structures that pulse without requiring any energy—like a ticking clock that never needs winding. The pattern repeats in time in much the same way that the atoms of a crystal repeat in space. The idea was so challenging that when Nobel prize–winning physicist Frank Wilczek, Professor (1989–2000) in the School of Natural Sciences, proposed the provocative concept in 2012, other researchers quickly proved there was no way to create time crystals.
Read more at Scientific American.