Photo of the Day

Aerial view of sand dunes
September 25, 2010

Sand Dunes

This Month in Photo of the Day: Nature and Weather Photos

Ribbons of dunes trap the rains.



See more photos of Brazil dunes »

Photograph by George Steinmetz, National Geographic

Go Further

Subscriber Exclusive Content

See how NASA’s new Mars rover will explore the red planet

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history