Scientifically speaking, the term “crystal” refers to any solid that has an ordered chemical structure. This means that its parts are arranged in a precisely ordered pattern, like bricks in a wall.

For the first time, scientists have watched metal crystals take shape inside a pool of molten metal, capturing a process that ...

If you dissolve sugar in hot water and then cool it down, you'll see pure sugar crystals form while impurities stay in the ...