Mammals, Mammal Pictures, Facts About Mammals

Happy International Sloth Day

Learn More About the World's Slowest Mammal

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Mammal Features

Animal Conservation

Find out what National Geographic Society is doing to save animals all over the world, and learn what you can do to help.
Crittercam Helps Study Rare Species

The Hawaiian monk seal is one of the oldest species of seal on the planet. But their tenure in paradise is perilously close to its end; only about 1,100 seals remain in the wild.
Lions Quiz

The king of cats rules with a roar and a fierce bite. What else do you know about this top predator?
Cause an Uproar

Big cats are quickly disappearing. Now is the time to act. Cause an uproar to save big cats today.
Little Kitty of the Week

Meet this week's Little Kitty of the Week and browse previous featured kitties. Show your support for big cats and upload a photo of your little kitty today!

These Animals Will Electrify You

Learn why some electric fish have an overdeveloped chin and how hornets can convert sunlight into electricity.

Thursday
How Disco Clams Got Their Groove

These reef-dwelling clams flash their shiny lips to put on quite the light show.

Wednesday

Alan Guth: Waiting for the Big Bang

Three decades ago, the innovative physicist had a eureka moment that explained the universe.

Gannets Pictures

Champion divers but clumsy landers, doting parents but hostile neighbors—northern gannets abound in contradictions.
Estonia's Ural Owls

Photographer Sven Začek provides an intimate view of this large raptor.