How are polar bear formed?

Polar bears (Ursus maritimus) are not "formed" in a conventional sense, as they are living organisms that evolved over time. They are believed to have descended from brown bears around 500,000 years ago as they adapted to the Arctic environment. Their unique physical and behavioral traits, such as thick fur and a layer of blubber, have developed through natural selection to help them survive in cold climates and hunt seals, their primary prey. Additionally, their reproduction involves mating and giving birth to cubs, typically in snow dens.