Mark Dickey became sick with stomach bleeding 3,000 feet deep inside Taurus Mountains; researcher has sufficiently recovered that process to move him out can begin, official says

Oil lamps and fragments of human skull lead archaeologists to believe Teomim Cave was used for necromancy, or communication with dead, some 1,700 years ago

Blind, colorless arthropods make their home in Ayalon Cave in central Israel, thriving in dark, oxygen-free environment, fed by sulfurous water rising from deep in the earth

Archaeologists examining Wonderwerk Cave in South Africa find more indications humans were active there nearly a million years before accepted estimates

French study examining effects of being cut off from world finds time seemed to pass more slowly for participants as they lived underground, deprived of clocks or sunlight