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.
Ecuador declared a state of emergency at the Galapagos Islands, a week after the stranding of a cargo ship loaded with supplies that included hazardous materials.
Up to 10 million gallons of crude oil from the 2010 Deepwater Horizon oil spill has settled at the bottom of the Gulf of Mexico.
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