New Mexico geologist and author Magdalena Sandoval Donahue discusses the interesting geology of the Santa Fe National Forest ...

The Movile Cave, located just a few miles west of the Black Sea in Romania, is one of the most remarkable and isolated ecosystems on Earth. Sealed off from the outside world for about 5.5 million ...

I’ve dived all over, but there’s something about cenotes that never gets old. I’m obsessed. Each one is like its own secret swimming hole. Some look small on the outside, but once you’re in, they open ...