Onne van der Wal / Laundry hanging out to dry. Valparaiso, Chile, 2008.

Jerry Monkman / Whitewater rafting down Dragon's Tooth rapid on the Deerfield River in Rowe, Massachusetts, USA. Dryway run, Class IV. September 2006

Jerry Monkman / Whitewater rafting down Split-Hair rapid on the Deerfield River in Rowe, Massachusetts, USA, Dryway run. September 2006

David Kjaer / Blue Tit (Parus caeruleus) in poor condition, exhausted from feeding chicks all season, Worcestershire, England, UK, June.

Steven Kazlowski / Run-down transport system and boardwalk in the Russian coal mining settlement of Barentsburg, Spitsbergen, Norway, Europe. July 2009

Donald M. Jones / Timber Wolf (Canis lupus) group running down American Elk (Cervus elaphus nelsoni) bull, Yellowstone National Park, Wyoming

Donald M. Jones / Timber Wolf (Canis lupus) group running down American Elk (Cervus elaphus nelsoni) bull, Yellowstone National Park, Wyoming

ZSSD / Desert Bighorn Sheep (Ovis canadensis nelsoni) two kids running down slope, native to North America

Sumio Harada / Mountain Goat (Oreamnos americanus) male running down snowy mountain slope, Glacier National Park, Montana

Sumio Harada / Mountain Goat (Oreamnos americanus) adult and two month old kids running down steep mountain slope, Glacier National Park, Montana

Yva Momatiuk & John Eastcott / Mustang (Equus caballus) family band running down rocky slope in desert, Fifteen Mile Herd Management Area, central Wyoming

Jim Brandenburg / Gemsbok (Oryx gazella) running down sand dune, Namib Desert, Namibia

Michael Quinton / White-tailed Deer (Odocoileus virginianus) running down snow-covered river bank into water, Yellowstone National Park, Wyoming

Michael Quinton / Caribou (Rangifer tarandus) bull running down hill, Alaska