Millions of animals are at risk, but what are the rarest animals in the world? These are some of the most endangered animals, teetering on extinction.

Whales are a group of mammals that live in oceans. They include some of the largest animals on Earth. The blue whale is the ...

Resurrecting extinct animals is both “exhilarating and terrifying ... until about 11,000 years ago]. When the largest of these bears stood on his hind legs, he would have been nearly 12 ...

Scientists don't call it the "Great Dying" for nothing. About 252 million years ago, upward of 80% of all marine species ...

To modern eyes, it looks like an exaggeration or a parody, but it was an accurate representation of an animal that early ... and they sported the largest antlers the world has ever known—12 ...

In the last 500 years, 800 species of animal have ... primate in the world. Currently, 95% of their known species and sub species are close to extinction. The biggest threat to their future ...

which we’re featuring in this special issue on endangered wildlife. From National Geographic’s Photo Ark and Joel Sartore, Vanishing: The World’s Most Vulnerable Animals is available where ...

Animals are disappearing ... of shrinking habitats. Their biggest threat: humans. No trace of the wild South China tiger, Panthera tigris amoyensis (critically endangered, possibly extinct in ...