Polar bears have an excellent sense of smell, with the ability to detect seals nearly a mile away (1.6 km).
At birth, polar bear cubs are 12 to 14 inches long and weigh around one pound. Ringed seals are their preferred prey, but in winter, they will eat anything they can catch. In summer, they eat leaves, berries, and seaweed. Polar bears are made for the cold. Their hairs are hollow, making for excellent insulation that is capable of trapping much of their body heat.