Here's 4 ways you can tell the age of a polar bear: 1 - their teeth. Polar bears, unfortunately, don't have access to dental care. Their long lives (sometimes exceeding 25 years) lead to slow tooth decay. The more yellow a bears teeth, the older they are. 2 - their scars and fur. Generally, older male bears will be heavily scarred around their faces. This is from many years of competing for mates and potentially food sources on the ice. Both male and female bears will also appear to have droopy

Polar Bear Cubs: Surviving Arctic Challenges | Real Wild