Until this year, scientists hadn't seen the Bouvier's red colobus monkey in the wild since the 1970s.
Officials think it all started with a handful of pets discarded in Teller Lake #5.
The animals were set free after tests confirmed they were free of bovine TB and parasitic tapeworms.
Orangutans can impersonate larger, scarier animals by altering their calls with their hands.
From March through early April, about 600,000 sandhill cranes will stop at Nebraska's Platte river.
A competition inspired by the NCAA basketball tournament lets you pit one mammal over another.
Things are looking up for the world's rarest cat, whose population has doubled in number over the past decade.
Penguins can only taste two flavors, salty and sour, according to new research that sheds light on why temperature is so important to food appreciation.
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