Subscribe Now! National Geographic Magazine $15
Home
Animals
Daily News
Environment
Green Guide
History
Kids
Maps
Music
Photography
Science & Space
Travel & Cultures
Video
National Geographic Magazine
National Geographic Channel
Magazines
Shop
Subscriptions
TV & Film
Travel With Us
Our Mission
Visit our Online Shops
Books & Atlases
Clothing & Accessories
DVDs
Maps
Catalog Quick Shop

Sign up for free

Newsletters

Once a month
get new photos
and expert tips.

Sign up

Kalahari Clouds
Photo: Cloudy sky in the Kalahari
WALLPAPER
Light, fluffy clouds stretch across the broad sky of South Africa's Kalahari Desert. Most clouds are produced by the upward motion of air, which may be caused by weather or local topography.
Photograph by Mattias Klum

Related Photo Galleries
Photo: Midnight sun on Baffin Island, Canada

Photo Gallery: Climate

Photo: Waterfall and turquoise water on Baffin Island

Photo Gallery: Erosion and Weathering

Photo: Sunrise over Coastguard Beach

Photo Gallery: Coastlines

Earth Topics

SPECIAL ADVERTISING SECTION
Photo: Hot spring in Ethiopia's Danakil Depression

Pathways to a Greener World

Join the climate conversation.
2008 Grand Prize Winner

Photo Gallery

See who won this year’s grand prize trip to the Grand Canyon!

Order Human Footprint on DVD Today
Image: Cover of Human Footprint DVD

Discover the extraordinary impact that an average human life has on the world.

Buy the DVD

Natural Disasters
Photo: A tornado

Get the science behind avalanches, tsunamis, and more.

Go Now

Support Conservation
Photo: Two penguins

Help conserve the world's natural resources.

Learn More