Cuicuilco was once a thriving center of early Mesoamerican life — until a volcanic eruption buried it in lava over 1,400 years ago. Its unique circular pyramid still stands as a relic of fire rituals, ...

Scientists explored several lava tubes in Vietnam and found some “bent-toed” creatures in the caves in a first-of-its-kind sighting, photos show. Photo from Nguyen, Tran, Nguyen, Hoang and Nguyen ...

Fountains from the south vent at Kilauea’s summit crater soared 1,300 feet (400 meters) into the air, the U.S. Geological Survey said. That is taller than New York’s Empire State Building which is ...