Early Europeans known as the Magdalenians celebrated by removing the ears of their enemies, scooping out their brains, and ...

From stunning art museums to breathtaking religious buildings, here are the things you need to see and do in Spain before you ...

Costa Rica's Alajuela Province is home to the deadly 'Cave of Death,' where carbon dioxide continuously seeps, creating an asphyxiating environment. The cave is a mere six feet deep and emits up ...

Deep inside a partially flooded cave of eastern Spain, scientists studied the walls by flashlight. Some markings and a coin jammed between rock formations caught their attention — and for good ...

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 ...