Pregnant polar bear females usually enter the den in late autumn and remain there throughout the winter. They don't eat ...

How much they weigh: From as little as 60 pounds (27 kilograms) to more than 1,700 pounds (771 kg) ...

The Cincinnati Zoo & Botanical Garden counts on federal funds to grow cat, polar bear and rhino populations country-wide. The ...

One of the great marvels of nature is how bears, the largest carnivore in North America, are able to hibernate all winter, ...

Many bear species don't hibernate at all ... so they don't hibernate, either. However, pregnant polar bears do dig dens to prepare for the birth of their cubs. They spend most of their time ...

To a layperson, it’s footage of adorable polar bear cubs with their moms against the backdrop of endless Arctic snow. For researchers who study the animals, however, it’s a rare and incredibly ...

Although it was only briefly seen during the live webcast of its launch, the Fram2 mission's zero-gravity indicator was ...

Elon Musk's SpaceX on Monday launched a crew of four private astronauts led by a crypto entrepreneur on a mission to orbit ...

SpaceX chalked up another human spaceflight Monday night, taking four civilians on a trip around the Earth that has never ...

"With the same pioneering spirit as early polar explorers, we aim to bring back new data and knowledge to advance the long-term goals of space exploration," said mission commander Chun Wang.