UC San Diego bioengineer Kiana Aran spent five days sealed inside a pitch-black chamber in rural Poland last November, ...

The Sahara Desert, now the largest hot desert on Earth, was once dramatically different. Geological evidence from caves in southern Morocco shows that the region received far more rainfall thousands ...

At a site known as Natural Trap Cave, a team of scientists are rappelling down to uncover the secrets of what the Earth was like during the Pleistocene ...

Deep inside Puerto Rico’s caves, a snake hangs silently from the ceiling, waiting. With perfect timing, the Puerto Rican boa lunges mid-air to snatch flying bats. How does this unusual hunting trick ...

In the depths of Scarisoara cave in Romania sits one of the world’s biggest underground glaciers, a monumental slab of ice the size of roughly 40 Olympic swimming pools that began to form around ...

On a cold November day, Kiana Aran awoke to a surreal vision: Beyond a glass partition, she saw her mother, her cousin, and her grandmother—who had passed away years earlier—watching something on an ...