A standard time crystal is a new phase of matter that features perpetual motion without expending energy. According to Chong ...

Discovered in 1999 inside an abandoned mine in Southern Spain, Pulpí Geode is the largest crystal 'cave' of its kind in the world. But what exactly is a geode and how do crystals form inside them?

University of Houston video—the first of its kind—shows how cholesterol crystals grow inside a tiny fluid device using a mix of alcohol and water. Over 20 minutes, a thin crystal forms as ...