Deep within Africa’s Great Rift Valley, Virunga National Park is home to some of the continent’s most active volcanoes, ...

Lava tubes form when a lava stream cools and forms a hardened exterior ... lunar lava tubes could have existed," Carrer said.

AP Known as one of the world’s most lively volcanoes, Kilauea has been belching a stream of lava in eruptions inside Hawaii Volcanoes National Park since Dec. 23. By early Wednesday, fountains ...

YOGYAKARTA, Indonesia--Indonesia’s most volatile volcano erupted Friday, releasing plumes of ash high into the air and sending streams of lava with searing gas clouds flowing down its slopes.

These spatter fountains continued to increase in intensity, and by 6 :35 p.m. Thursday, spattering could be seen on the streaming webcam. The spattering increased overnight—and lava erupted from ...

If these lava tubes are anything like Earth's, they could be the perfect place for astronauts to hunker down during their stay on Mars. "There's more than one of these [pits] on Mars that we've ...