Photo by <n>V. Pantenburg</n> from the 1958 book <n>El mundo de los Mamíferos</n>.

A polar bear in Greenland, photographed by <n>Ivars Silis</n> for <n>Greenland Today</n> in 1982.

The <n>Polar Bear Hot Air Balloon</n> designed by <n>L’Atelier in the Sky</n> for the <n>World Wildlife Fund (WWF)</n>.

Director <n>Jean-Jacques Annaud</n> with <n>Bart the Bear</n> on the set of the 1988 film <n>The Bear</n>.

<n>Ice Bed</n> by <n>Nima Sarikhani</n>, winner of the People's Choice Award at <n>Wildlife Photographer of the Year</n>.

<n>Polar Reflections</n> by photographer <n>Paul Nicklen</n>, captured in Nunavut, Canada.

<n>The North Wind</n> (2010), a photograph by <n>Susanna Majuri</n>.

<n>Nap with Mom</n>, a photograph of a polar bear mother and cub by <n>Jason Leo Bantle</n>.

A polar bear stands on its hind legs underwater in a 1962 photograph by <n>Bill Ray</n>.

Soviet explorer <n>Nikolai Machulyak</n> feeds condensed milk to a polar bear and her cubs, 1976.

Director <n>Jean-Jacques Annaud</n> with the bear <n>La Douce</n> on the set of his 1988 film <n>The Bear</n>.