Why it's awesome: Earth's oceans are home to many secretive and unusual creatures that humans rarely see — including giant ...

For a long time, scientists believed the first humans to arrive in the Americas soon killed off these giant ground sloths through hunting, along with many other massive animals like mastodons ...

South American megafauna, from giant sloths to camel-like creatures, survived thousands of years longer than we thought, ...

The wait is over! The Smithsonian National Zoo's newest giant pandas, Bao Li and Qing Bao, are set to make their public debut ...