Cleaning the elephant models at the Natural History Museum of Los Angeles County, California (© Brian Doben/Gallery Stock)(Bing Canada)

Navagio Beach at Zakynthos, Greece (© Maciej Tomków/Nimia)(Bing Canada)

Close-up of the nose of Space Shuttle Atlantis on exhibit at Kennedy Space Center, Florida (© Matthew Kuhns/Tandem Stills + Motion)(Bing Canada)

Henequen agave in Yucatan Peninsula, Mexico (© Brian Overcast/Alamy)(Bing Canada)

The path to Morskie Oko, Tatra National Park, Poland (© Blake Parker/Tandem Still + Motion)(Bing Canada)

Greyface moray eels in the Andaman Sea (© Reinhard Dirscherl/Aurora Photos)(Bing Canada)

Guoliang Tunnel in the Taihang Mountains in Henan Province, China (© View Stock/Offset)(Bing Canada)

Stair-step Moss (Hylocomium Splendens) illuminated by sunlight in a damp forest (© Christopher Kimmel/Aurora Photos)(Bing Canada)

A mountain goat in Glacier National Park, Montana (© Sumio Harada/Minden Pictures)(Bing Canada)

Vernal Fall at Yosemite National Park, California (© Framepool)(Bing Canada)

Sandhill cranes over barley fields near the Alaska Range, Delta Junction, Alaska (© Yva Momatiuk and John Eastcott/Minden Pictures)(Bing Canada)

Cheetah mother and her week-old cub, Maasai Mara National Reserve, Kenya (© Suzi Eszterhas/Minden Pictures)(Bing Canada)

Incense factory in Xinhui District, Jiangmen City, Guangdong Province, China (© Wallace Cheah/500px)(Bing Canada)

Porthminster Beach and St. Ives, Cornwall, England (© Adam Burton/Minden Pictures)(Bing Canada)

Uinta ground squirrels at Tower Fall Campground in Yellowstone National Park, Wyoming (© Shin Yoshino/Minden Pictures)(Bing Canada)

Paläon Research and Experience Center, Schöningen, Germany (© WestEnd61/REX/Shutterstock)(Bing Canada)

Spring Tulip Festival in Ottawa (© Roger de Montfort/Shutterstock)(Bing Canada)

View of Toronto skyline taken from CN Tower, Toronto (© robertharding/Alamy Stock Photo)(Bing Canada)

Thunderstorms over Lake Powell, Arizona (© Babak Tafreshi/Getty Images)(Bing Canada)

White-throated dipper at Tufa Dam, on the River Lathkill in Derbyshire, England (© Ben Hall/Minden Pictures)(Bing Canada)

The Brooklyn Bridge, New York (© Inge Johnsson/age fotostock)(Bing Canada)

The Pyramids of Meroë in Sudan (© Andrew McConnell/Alamy)(Bing Canada)

Fern fiddleheads at Valley Falls Park in Vernon, Connecticut (© Holcy/Getty Images)(Bing Canada)

Smoldering Mount Bromo in East Java, Indonesia (© Shutterstock)(Bing Canada)

Puente de Matadero with mural by artist Daniel Canogar in Madrid, Spain (© Luis Davilla/age fotostock)(Bing Canada)

Polar bear (Nanook) playing in fireweed (© Dennis Fast/VWPics/Alamy Stock Photo)(Bing Canada)

Temple Street Night Market in Yau Ma Tei, Hong Kong (© Peter Stewart/500px)(Bing Canada)

Fog over Mount Tamalpais State Park, California (© Jonathan Mitchell/Nimia)(Bing Canada)