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 ...

Superstition Mountains, Praying Hands Formation Canyon

Superstition Mountains, Praying Hands Formation Canyon

1024x768, 179K

Morning Light Falls on the Forest, Nashville

Morning Light Falls on the Forest, Nashville

1024x768, 420K

Multiple Strikes

Multiple Strikes

1024x768, 132K

Afterglow, Hawaii Tropical Islands

Afterglow, Hawaii Tropical Islands

1024x768, 183K

Great Sand Dunes National Monument

Great Sand Dunes National Monument

1024x768, 200K

Crescent Moons, Wiltshire, England

Crescent Moons, Wiltshire, England

1024x768, 487K

Cades Cove Sunrise, Great Smoky Mountains, Tennessee

Cades Cove Sunrise, Great Smoky Mountains, Tennessee

1024x768, 106K

First Snowfall Scenery, Snake River, Wyoming

First Snowfall Scenery, Snake River, Wyoming

1024x768, 307K

Heaven's Rays

Heaven's Rays

1024x768, 128K

Moon Over Mount Nuptse, Nepal

Moon Over Mount Nuptse, Nepal

1024x768, 243K

Tropical Beach at Sunset, The Seychelles

Tropical Beach at Sunset, The Seychelles

1024x768, 158K

First Strike Thunderbolt

First Strike Thunderbolt

1024x768, 122K

Formations, Slot Canyon, Arizona, USA

Formations, Slot Canyon, Arizona, USA

1024x768, 204K

Sight Seeing by Canoe, Lake Tahoe South Shore

Sight Seeing by Canoe, Lake Tahoe South Shore

1024x768, 305K

Spillway Detail, Four Mile Creek, Tennessee

Spillway Detail, Four Mile Creek, Tennessee

1024x768, 169K