Rare walruses in one of the few successful keeping programs in Europe.
Walruses can slow their heartbeat to stay warm in icy water.
Asian elephants in a modern open-air enclosure.
Asian elephants communicate via infrasound that humans cannot hear.
Bornean orangutans in a naturalistic tropical house.
Orangutans build a new sleeping nest in the treetops every evening.
The largest land-dwelling predator on Earth.
A polar bear's fur is not white but transparent – the skin underneath is black.
The second-largest penguin species with distinctive orange neck coloring.
King penguins incubate their egg on their feet under a brood pouch.