World's largest redwood forest outside of California is coming — to Ireland

Caribou herd in Alaska suffering from mysterious decline

Obama's national monuments are a big deal

This Canadian town hosts over 1,000 polar bears every year

Vintage travel posters push the allure of now-extinct animals

Town builds New Zealand's first penguin tunnel

'Headhunt Revisited' explores an audacious journey

6 ways to help elephants

11 incredible facts about lemurs

Why would militants take over a wildlife refuge?

Earth gets a surge of new ocean sanctuaries

Ivan, the shopping mall gorilla, is memorialized with 3-D-printed statue