Nature

The origin of life on Earth is not well understood, but it is known to have occurred at least 3.5 billion years ago, during the hadean or archean eons on a primordial Earth that had a substantially different environment than is found at present. These life forms possessed ...

Carmel Coast Sunset, California

Carmel Coast Sunset, California

1024x768, 176K

East African Sunset Scene Wallpaper

East African Sunset Scene Wallpaper

1024x768, 157K

Ocotillo, Sonora Desert, Arizona

Ocotillo, Sonora Desert, Arizona

1024x768, 223K

Snow Flocks Yosemite National Park, California

Snow Flocks Yosemite National Park, California

1024x768, 396K

Mammoth Terraces, Yellowstone National Park, Wyoming

Mammoth Terraces, Yellowstone National Park, Wyoming

1024x768, 264K

Ecola Point, Cannon Beach, Oregon Coast

Ecola Point, Cannon Beach, Oregon Coast

1024x768, 216K

Roaring Fork River and Moss Covered Rocks, Great Smokies

Roaring Fork River and Moss Covered Rocks, Great Smokies

1024x768, 232K

Garden of the Gods, Colorado Springs, Colorado

Garden of the Gods, Colorado Springs, Colorado

1024x768, 254K

Mossbrae Falls, Dunsmuir, California

Mossbrae Falls, Dunsmuir, California

1024x768, 253K

Grand Teton National Park, Wyoming

Grand Teton National Park, Wyoming

1024x768, 173K

Evening Falls over Sea Stacks, Ecola State Park

Evening Falls over Sea Stacks, Ecola State Park

1024x768, 105K

Lake Pend Oreille, Sandpoint, Idaho

Lake Pend Oreille, Sandpoint, Idaho

1024x768, 195K

Mount Kilimanjaro, Tanzania, Africa

Mount Kilimanjaro, Tanzania, Africa

1680x1050, 367K

West Mitten, Monument Valley, Arizona

West Mitten, Monument Valley, Arizona

1024x768, 249K

Rushing Waters of Spring, Grand Teton, Wyoming

Rushing Waters of Spring, Grand Teton, Wyoming

1024x768, 291K