Life

The mechanism by which life began on Earth is unknown, although many hypotheses have been formulated. Since emerging, life has evolved into a variety of forms, which have been classified into a hierarchy of taxa. Life can survive and thrive in a wide range of conditions. ...

Mammoth Hot Springs, Yellowstone National Park

Mammoth Hot Springs, Yellowstone National Park

37 downloads today
in cat. Nature

Parthenon Temple, Athens, Greece

Parthenon Temple, Athens, Greece

35 downloads today
in cat. Travel

Fall Colors - Mountains in Autumn

Fall Colors - Mountains in Autumn

33 downloads today
in cat. Nature

Deep Creek Valley, Great Smoky Mountains NP

Deep Creek Valley, Great Smoky Mountains NP

31 downloads today
in cat. Nature

Sand Crab Wallpaper

Sand Crab Wallpaper

31 downloads today
in cat. Animals

US Capitol Building at Night, Washington DC

US Capitol Building at Night, Washington DC

31 downloads today
in cat. Travel

Quebec City, Quebec, Canada

Quebec City, Quebec, Canada

30 downloads today
in cat. Travel

Jack Hills of Australia's Narre Gneiss Terrane

Jack Hills of Australia's Narre Gneiss Terrane

28 downloads today
in cat. Space

Cute Twins Kitties

Cute Twins Kitties

27 downloads today
in cat. Animals

Young Golden Retriever Pet

Young Golden Retriever Pet

26 downloads today
in cat. Animals

Yucca Tree, White Sands National Monument, New Mexico, USA

Yucca Tree, White Sands National Monument, New Mexico, USA

25 downloads today
in cat. Nature

Old Port of Montreal, Quebec, Canada

Old Port of Montreal, Quebec, Canada

24 downloads today
in cat. Travel

Cliff Lake and the Tatoosh Range, Mount Rainier

Cliff Lake and the Tatoosh Range, Mount Rainier

23 downloads today
in cat. Nature

East African Sunset Scene Wallpaper

East African Sunset Scene Wallpaper

23 downloads today
in cat. Nature

Funny Hamster

Funny Hamster

22 downloads today
in cat. Animals