Then, long buried under later deposits, the dead reef became limestone, the ideal stone for caves. A natural collapse just inside the entrance pit had blocked Lechuguilla for thousands of years ...

Many of the world’s most iconic caves—Carlsbad Caverns and Lechuguilla in New Mexico ... says that whenever human remains are found inside a lava tube, they render the entire cave system ...

I have a colleague, Larry Mallory, who works in Lechuguilla Cave and elsewhere ... acid and live in an environment that's just like the inside of your car battery. "Extremophile" is a very ...