A 1925 eruption on the Greek island of Santorini was preceded by an influx of magma into the volcano's lava chamber—a finding that could help predict future eruptions.

The newfound species may have been a staple of some early humans. And its overharvesting may have helped spur humans out of Africa, a new study says.

Vast swathes of "pristine" Amazon rain forest may have been sophisticated "garden cities" prior to the arrival of European colonists, anthropologists say.

This year poachers have killed 10 percent of the elephants in Africa's largest national park—driven largely by Chinese demand for ivory—park officials say.

Dental pulp from a wisdom tooth could be a new source of therapeutic stem cells, sidestepping the ethical concerns of embryonic cells, Japanese researchers claim.

In Buñol, Spain, residents and tourists pelt each other with more than 200,000 pounds of ripe tomatoes in the annual Tomatina festival.

Just 48 hours of sunlight can kill germs that cause cholera, typhoid, and other diseases—a discovery that's already helping Kenya's poor.

A distant cousin of the famous "bullet cluster" shows the same separation of dark and ordinary matter occurring as its two parent galaxy clusters collide at high speed.

A rare albino right whale frolics in the water, a mother giraffe nuzzles its baby, and more in our new weekly roundup of animal photos.