Mammals are among the most adaptable animals on the planet. They are found on every continent and in every ocean, and range in size from tiny bumblebee bats to enormous blue whales. One reason for ...

A one-foot-long baby squid was spotted swimming in the waters around the South Sandwich islands. The footage is unprecedented ...

A new study based on two decades of data shows what happens in an ocean ecosystem without great white sharks. Great white ...

Reptiles first appear in the fossil record 315 million years ago and were the dominant animals during the Mesozoic era, which lasted for 270 million years until the extinction of the dinosaurs.

Some transport water, oxygen, and carbon dioxide either into or out of the animal. Others fight bacteria or fungal infections. And at least one—in each species—is used for defense. To warn ...

Its brain is proportionally larger than those found in living reptiles, so the animal may have been as intelligent as modern birds, which are more similar in brain size. Troodon walked (and ran ...

What is a woolly monkey? An animal called a woolly monkey seems like it should live in the frozen north, not the sweltering Amazon Basin. But the thick coat of fur covering these large primates ...

Learn more facts about the Big Five and encounter these iconic creatures up close while on safari in Africa with National Geographic Expeditions. Some states provide residents (or, in some cases ...

Nevertheless, Emmanuel Gheerbrant, a researcher for the National Center for Scientific Research in France, speculates that Africa "must have been a laboratory for some very peculiar animals." ...

Owls are efficient nighttime hunters that strike from above, and use their powerful talons to kill and carry animals several times heavier than themselves. Owls prey on a huge variety of creatures ...

They did it long before birds and bats. And it terms of size, they pushed the envelope as far as it could go for a flying animal." Like their cousins the dinosaurs, pterosaurs stand out as one of ...

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