The fossils — which may date back to 1.4 million years — were nicknamed “Pink” in honor of iconic rock band Pink Floyd.

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?

Related: Water leaking into Earth's core may have birthed a mysterious layer that churns out crystals Mining operations in ...

Photo from A. Ruiz-Redondo, V. Barciela and X. Martorell Deep inside a partially flooded cave of eastern Spain, scientists studied the walls by flashlight. Some markings and a coin jammed between ...

Fragments of a partial skull unearthed in a cave in northern Spain have revealed a previously unknown population of ancient ...

This is the Panel of Hands, El Castillo Cave, Spain. A hand stencil has been dated to earlier than 37,300 years ago and a red disk to earlier than 40,600 years ago, making them the oldest cave ...

U.S. News Insider Tip: Café Olé, just outside the Crystal & Fantasy Caves, has one of the best fish sandwiches on the island. A sun hat is essential because you'll sit in the garden while they ...