On Sunday’s episode of The Excerpt podcast: Hidden beneath Earth’s surface are caverns and pathways that hold the secrets of our planet’s very beginnings. Even after decades of exploration, there are ...

Chinese astronauts, known as taikonauts, were sent into a large limestone cave system in a remote area of China.

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 ...

Spelunking, the word for cave exploring, is a fun one. It's also a fun activity. With almost 3,000 caves in Texas, there are plenty of opportunities for it. And with more extreme heat coming to San ...