Extinction

The so-called 'Nemesis' star has not been flinging dangerous comets at Earth.

Increases in the human population, possibly up to 10-fold, in southwestern France might have pushed the Neanderthals out of the area.

The turtles and their water-loving cousins seem to have survived because of their slow metabolisms, but why did the mammals win out in the end?

How many rats would you kill to save a million seabirds?

Extinction levels from habitat loss may not be as bad as predicted, as evidenced by a lack of observed extinctions.

Land crabs appear to have lived on the Hawaiian Islands until the arrival of humans.

The arm bones of the extinct Tasmanian tiger show they hunted differently than dingoes, which could mean the competition might not have been the major factor leading to their demise in Australia.

By substituting one tortoise for extinct ones, scientists say they are healing an island.

Not just one cause has brought many frogs to the brink of extinction, new report finds.

Keen sense of smell may have given birds the edge.

The tiny parasites were likely around during the Age of Dinosaurs.

Scientists have so far identified only an estimated 20 percent of animals.

Vulnerability of a species changes with local conditions.

The large, agile cats once roamed the eastern United States.

Will 75 percent of Earth's species go the way of the dodo?

Report lists 25 species that are disappearing fast.

New details on the Earth's first mass extinction event are revealed by a study that explored temperatures and glacier expansion at the time.

The ancient reptile mom likely had a violent accident and drown some 160 million years ago.

Fungi that appeared from nowhere are wiping out whole species of amphibians and more than a million bats just by attacking the skin.