Movile Cave in Romania has evolved independently since it was cut off from the air and sunlight 5.5 million years ago. Its extreme environment seems inhospitable to most life on Earth. Yet, this place ...

Jewel Cave, South Dakota: America’s third-longest cave system offers wild tours requiring participants to scramble over breakdown (pieces of collapsed cave wall), chimney or squeeze up and down ...

On April 6, 2025, in Zermatt, Switzerland, @l_sklenarik_ shared a thrilling video of skiing down a steep, snow-covered slope.

Why do humans undertake journeys of personal exploration, or subject themselves to challenging conditions for long periods of time? What might we learn from their experiences? British mountaineer ...

Scientists have long theorized the existence of lunar caves — underground passageways formed through volcanic processes that are connected to the pits covering the moon’s surface. Now, a team of ...

Rowena Christiansen does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations ...