Extinction

The report assesses nations' performance preventing the illegal wildlife trade.

Tropical rodents’ habit of stealing from one another may explain how certain trees have survived.

A "death delay" means 80 percent of species could die out due to historical deforestation.

The U.S. Fish and Wildlife Service proposes protecting four foreign bird species.

Without intensive conservation, California condors could easily vanish.

At a certain threshold, the environment behaves in unpredictable ways.

It took at least 10 million years for Earth to get back on track after losing 90 percent of its species.

Some species saw a slow decline.

The Amur leopard gets a protected habitat in Russia.

Fewer than 40 Amur leopards survive in the wild.

Loss of Australia's 10-foot kangaroos and rhino-size wombats led to changes in landscape and wildfire outbreaks.

A new discovery raises lost hopes for a rare primate.

The western black rhino has gone extinct, mostly because it is poached for its horn.

Broken eggshells and baby bird bones reveal an ancient disaster.

A rundown of the arrows in our planetary defense quiver.

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.