A "raft" of light, porous volcanic rock that's as big as the island of Manhattan is floating toward Australia, and it could spell relief for the embattled Great Barrier Reef. Satellite images provided ...

Rainbow trout breed in cold, shallow streams. UC Davis researchers are studying how springs fed from water stored in volcanic rock can support these and related fish. Photo: Phil Reedy In an age of ...

Beneath the road on a snow-dusted mountain in the Hellisheiði region of southwest Iceland, a river of boiling water flows through porous, volcanic rock. Above, thick steel pipes connect to geodesic ...