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?

and it is generally not possible to explain why even simple crystals develop their characteristic shapes. A case in point is the snow crystal, which grows into a puzzling variety of unusual ...

Crystal Mountain The accolades for Mother Nature are pouring in from ski resorts across Michigan as seasonal snowfall totals continue to climb in what’s being billed as a “comeback winter ...