For the first time, scientists have watched metal crystals take shape inside a pool of molten metal, capturing a process that usually unfolds out of sight in the heart of furnaces and casting lines.

A time crystal is a form of matter that shows continuous, repeating patterns over time, much like how atoms in a normal crystal repeat in space. Examples once existed in only complex, quantum matter, ...

Crystals might look simple, but their growth tells a far more complex and fascinating story. From grains of salt to diamonds, crystals form when particles lock into repeating patterns. For many years, ...