

A snow covered bactrian camel stands in an enclosure at the zoo in Zurich, Switzerland, February 15, 2012. Arnd Wiegmann/Reuters
Corilynne Smith waves to the bus driver as her son Ayden Smith treks through the snow in Coeur d'Alene, Idaho, March 1, 2012. Kathy Plonka/The Spokesman-Review/AP
A girl looks out of a window covered in frost on a bus moving in heavy snow in Belgrade, Serbia, Feb. 3, 2012. Darko Vojinovic/AP
Eilidh Gunn enjoys sledding in Aviemore, Scotland, April 3, 2012. Russell Cheyne/Reuters
Three cows stand behind blossoms on a snow covered meadow in Oberstaufen in the southern German state of Bavaria, May 16, 2012. After summerlike days winter has returned in some alpine parts of the country. Felix Kaestle/AP
Palestinians play with snow near the West Bank town of Bethlehem, March 2, 2012. Bernat Armangue/AP
Sarah Arel clears snow from her roof in Ashburnham, Mass., Oct. 30, 2011. Michael Dwyer/AP
Jarno Rautio, of Finland (r.), waits for the start of a wing sailing race at the World Ice and Snow sailing championships on Feb. 25, 2012, on Chain Lake near St. Ignace, Mich. John L. Russell/AP
Members of the Special Warfare Command scrub their bodies with snow during an annual severe winter season drill during a photo opportunity for the media in Pyeongchang, about 111 miles east of Seoul, January 11, 2012. The special forces carry out the training course every year to improve their members' combat abilities in cold weather and heavy snowfall. Kim Hong-Ji/Reuters
A ringed seal looks out of a snow cave on the ice off of Barrow, Alaska, April 30, 2001. Brendan P. Kelly/AP
A train driver looks out of a locomotive during a heavy snowfall at the main railway station in Bucharest, Romania, Feb. 13, 2012. Vadim Ghirda/AP
Kremlin guards march near the Tomb of the Unknown soldier, beside Moscow's Kremlin, April 5, 2012. Mikhail Metzel/AP
People react as a rare snow fall hits Johannesburg, South Africa, Aug. 7, 2012. Jon Gambrell/AP
Birds perch on a branch during a spring snowstorm in Pembroke, N.Y., April 23, 2012. David Duprey/AP
Earl Underwood and Randy Klein hike to the top of Hidden Peak in several inches of newly fallen snow at Snowbird at Snowbird Ski and Summer Resort in Sandy, Utah, Sept. 25, 2012. Jeffrey D. Allred/Deseret News/AP
In an Aug. 7, 2012 photo, an Avalanche Lily pushes through the snow in Ellensburg, Wa. The plant is one of the early bloomers in spring and may be among the most sensitive to rising temperatures. Mark Harrison/The Seattle Times/AP
A woman shapes a heart in snow on Valentine's Day at the frozen lake Bled, northwestern Slovenia, February 14, 2012. Srdjan Zivulovic/Reuters