Extinction

Here's the horrifying way these sea creatures met their end more than 250 million years ago.

It turns out laziness existed long before couches and takeout.

A lack of new babies for endangered Northern Atlantic right whales makes their future even more uncertain.

Sudan, a 45-year-old rhino, is suffering from an age-related infection.

Extinction is not a good thing. Why are people still arguing about this?

A species of tiny, adorable marsupial that scientists thought had been extinct for more than 100 years has re-emerged in New South Wales, Australia.

A man hunting for mammoth tusks in Eastern Siberia came across an unexpected find in the permafrost: the mummy of a cat that lived during the last ice age.

A Russian man hunting for mammoth tusks in Eastern Siberia made an unexpected discovery in September: the incredibly furry, slightly squished mummy of a cat from the last ice age.

His name is Sudan, and he's been alone for awhile.

Caribbean islands hosted plenty of diverse mammal life — until humans showed up 6,000 years ago.

Are we facing insect Armageddon? A recent study found that German nature reserves have seen a 75 percent reduction in flying insects over the last 27 years.

A sixth mass extinction could be triggered by sharp increases in carbon dioxide by 2100, one new study suggests.

The dinosaur-killing asteroid that collided with Earth about 65.5 million years ago plunged the planet into a darkness that lasted nearly two years, a new study finds.

The eight-legged micro-animal called a tardigrade could survive nearly all the way until the death of the sun, a new study suggests — long after humans are history.

Nearly a third of the world's largest ocean species may have died during what researchers are calling the Pliocene marine megafauna extinction, which occurred 2-3 million years ago.

If scientists could resurrect extinct animals — such as the dodo, Columbian mammoth or Tasmanian tiger — should these animals have different names that distinguish them from the original species?

Only about 30 vaquitas are left in the wild.

Swipe right to help save the northern white rhinoceros.

The species, which haven't been seen for years or decades, include pink-headed ducks, red-thighed monkeys and a seahorse no one's ever seen in the wild.