Here are 10 facts about polar bears:

• Polar bears are classified as marine mammals
• They can swim constantly for days at a time
• They can sniff out prey from up to 16 km away
• The biggest threat to polar bears is climate change
• Polar bears touch noses to ask to share food
• Polar bears need  sea ice to survive
• Polar bears can live up to 20-30 years
• Female polar bears give birth to their cubs in snow dens
• Seals make up most of a polar bear’s diet
• They are intense predators that rarely fear humans, which can make them dangerous

Source: Google 

Featured Image: Flickr

Picture credit: Google