The hagfish is a slime-emitting ocean-dweller that's remained unchanged for 300 million years--and it shows. It has a skull (but no spine), velvet smooth skin, and a terrifying pit of a mouth that's lined with rows of razor-sharp teeth.

Green ants build their grand nests out of leaves, which they pull and join together with silk. Amazingly, this silk is produced by their newborn larvae.

Magnificent Leaf Homes Woven by Australian Green Ants (2:50)

Despite its dry desert landscapes, Utah is a land of surprises, and Glen Canyon is one of them, rivaling Arizona's Grand Canyon for sheer majesty.

Utah's Otherworldly Landscapes (2:20)

The bust of Nefertiti contains one of the most beautiful faces in the world. So beautiful, a mathematical formula was used to sculpt it.

How to Achieve Flawless Beauty (2:54)

Eric Green, director of the National Human Genome Research Institute, explains how genomics are revolutionizing medicine at Smithsonian's "The Future is Here" event