People visit Chinese artist Huang Yongping's installation art work named “Leviathanation” at Tang Contemporary Art of 798 Art District on March 29, 2011 in Beijing, China. The exhibition named “Tracing The Milky Way” will be last until May 14. (Photo by Feng Li/Getty Images)
Five year old Michael Esteban and his mother Kari Esteban, crawl through a 40-foot long, 4-foot high replica of a human colon on July 11, 2003 in Seattle. The colon is used to educate people on colorectal cancer. (Photo by Ron Wurzer/Getty Images)
Models promote a condom brand at the first Shenzhen s*x Culture Festival on September 21, 2007 in Shenzhen of Guangdong Province, China. The festival aims to increase awareness about reproductive health and popularise s*x education. (Photo by China Photos/Getty Images)
Burdened with a shawl full of her belongings, a woman stops for a rest on the road between Julaca and Puno in Peru. (Photo by Three Lions/Getty Images). Circa 1955
A dog called Oscar has laid claim to the title of the animal kingdom's most intrepid explorer after visiting famous landmarks around the world. His travels include five continents, 29 countries and stopping off everywhere from the Eiffel Tower to the Taj Mahal.