Extinction

The dinosaurs — the so-called tyrants of the Mesozoic era — weren't exactly thriving during their last few million years on Earth, a new study finds.

A project under way off the coast of Mexico may finally resolve a longstanding controversy.

A new study finds that dodos weren't dumb. Their smarts were probably comparable to that of modern pigeons.

A big brain can be a liability instead of an asset for many mammals, finds new research that identifies a reversal of a 40-million-year-old trend.

The burnt eggshell fragments of an ancient giant bird have helped scientists solve a 50,000-year-old whodunit in Australia.

The asteroid that killed the nonavian dinosaurs may have also killed countless marine animals after it triggered a worldwide algal bloom, a new study finds.

They were the worst of times. (Really, the worst.)

Hundreds of new species have been discovered in the Himalayas in recent years, but many face danger as climate change and overdevelopment alter their habitats.

The ongoing civil war in Syria has led to the first-ever withdrawal from the Svalbard "doomsday" Global Seed Vault.

The Russian Far East hosts some of the world's most exotic creatures, many represented by just a few hundred remaining animals that exist nowhere else.

Researchers are just beginning to untangle the mystery of why more than half of Kazakhstan's critically endangered saigas died off in a few weeks in late May.

Researchers are just beginning to untangle the mystery of why more than half of Kazakhstan's critically endangered saigas died off in a few weeks in late May.

One of the last five northern white rhinoceroses in the world has died. Three females and one male are left.

The mighty megafauna of the last ice age, including the wooly mammoths, short faced bears and cave lions, largely went extinct because of rapid climate-warming events, a new study finds.