9. Polar bears don’t hibernate. Females will spend more time in their dens when pregnant but generally these large animals keep going throughout the winter.
10. Female penguins sometimes travel 50 miles to the open ocean, for fish, squid and krill. When they return to the colony, they carry a stomach full of food to regurgitate to their young.
11. Polar bears occasionally inter-breed with grizzly bears creating a hybrid bear known as a pizzly bear, prizzly bear or grolar bear. The existence of these hybrid bears in the wild was only confirmed in 2006, but they are expected to become more common as polar bears extend their hunting grounds due to scarcity of pack ice.