An energetic pair of polar bear twins will be on view to the public at the Saint Louis Zoo for the first time today ...

Inside the den, it can be up to 25°C (45°F) hotter than on the surface thanks to the mother's body heat. So, by looking for when the polar bear stopped moving and started getting warmer ...

Polar bear twin brothers made their public debut Tuesday morning at the Saint Louis Zoo. Kallu and Kallik can be viewed at ...

ST. LOUIS — You can now say "hello" to polar bears Kallu and Kallik at the Saint Louis Zoo! After a weeks-long quarantine and acclimation period, the twin brothers made their public debut on Tuesday.

It’s a big world out there, especially for polar bear cubs emerging from their dens ... ready to leave the den in the spring, they are up to 20 times bigger than they were at birth.

Get Instant Summarized Text (Gist) Remote camera footage from Svalbard, Norway, provides the first detailed observations of polar bear cubs emerging from dens. The study highlights altered den ...

Mother bear with three cubs ... reaching around 10kg – up to 20 times their birth weight – by the time they leave the den in spring. Polar bears emerge from their birthing dens between ...