More than two-thirds of mammals in Africa and the Arabian Peninsula went extinct during the Eocene-Oligocene transition some 30 million years ago, a study finds.

They’ve survived volcanic eruptions, but one Caribbean island’s mountain chicken frogs might need help from scientists to escape the lethal chytrid fungus.

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.