Extinction

Climate swings and humans are the most likely suspects.

Conservation efforts like captive breeding programs are helping tigers avoid extinction. Will tigers survive?

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Just where the deadly space rock came from is still up in the air.

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.

Temperatures and animal populations are fluctuating more rapidly due to climate change.

Meeting in India this week is giving hope to conservation groups.

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