Edward Nunn of the USA, Toney Freeman of the USA and Dexter Jackson of the USA pose during the IFBB Australia Pro Grand Prix XII at The Plenary on March 9, 2013 in Melbourne, Australia. (Photo by Robert Cianflone)

A two-horse team street cleaner, with sprayer, squeegee, and roller at rear. New York, between ca. 1910 and ca. 1915. (Photo by NYC Municipal Archives)

Dustin Murley (L) and Jessey Sisson race on their ostriches during the annual Ostrich Festival in Chandler, Arizona March 10, 2013. (Photo by Joshua Lott/Reuters)

Billions of newly hatched locusts are spreading throughout Israel's South. The young locusts identified in the Negev Desert area are the offspring of locust swarms that entered Israel from Egypt in March. (Photo by Eliahu Hershkovitz/Haaretz)

Student protestors, including one girl with a camera, struggle with soldiers from the Chinese Army, the PLA. Tiananmen Square, 1989. (Photo by Jeff Widener/Associated Press)

Meet the real beach babes: the herd of pigs that live a life of luxury paddling in the crystal clear waters of the Bahamas, on August 28, 2013. (Photo by Caters News)

A shot of Pu'uo crater, the main source of lava from Kilauea, taken from a helicopter in Kilaura, Hawaii. (Photo by Kirk Aeder/Barcroft Media)

Model Heidi Klum attends her 8th Annual Halloween Party at The Green Door on October 31, 2007 in Los Angeles, California. (Photo by Charley Gallay/Getty Images)