The cave, located in the separatist region of Abkhazia ... But finally, on October 19, Kasjan dropped down a pit later dubbed Millennium and looked at his altimeter. He had passed the 2,000 ...

In the depths of the Hoyo Negro pit 180 feet below sea level, a diving team has successfully recovered the skulls, jaw bones, ...

On the other side, the cave widened. Collins crawled like a toddler until the earth pinched closed again. He wiggled through ...

Also called "dikengyuan" in Mandarin, which means "pit courtyards," the homes are a type of cave dwelling ("yaodong") commonly found in the Loess Plateau in northern China. "Academic literature ...