Researchers plan an oceanographic expedition to understand why a phytoplankton bloom developed as molten lava flowed into the sea east of Hawaii's Big Island.

Archaeologists unearthed the remains in a farm north of the doomed Italian city.

A new study counters the popular theory that after Mount Toba blew its top 74,000 years ago, humans almost went extinct.

Massive die-offs of just about every marine species millions of years ago are thought to have resulted from a surge of carbon dioxide.

Among the Ayta people of Mount Pinatubo it was a portent. A steam cloud that smelled like rotten eggs was rising from the peak.