Photographer Martin Schoeller examines the visual nuances of twins. Schoeller was born in Munich, Germany in 1968, studied photography at Lette Verein in Berlin and lives in New York. (Photo by Martin Schoeller)

Dillon was born in the spring of 2013. He lived for four months on the streets near Boston, MA before being scooped up by the Animal Rescue League of Boston.

«Sing»

The story of 20 children born or living with illness or health conditions is being told by Toronto photographer and artist Shawn Van Daele, by transforming their drawings into magical photographs.

A to-do list written by John Lennon on display at the GOTTA HAVE IT! Rock & Roll Pop Culture Auction Press Preview at the Gotta Have It! store on November 30, 2011 in New York City. (Photo by Andy Kropa/Getty Images)

A pair of giant pandas play in their enclosure at the Beijing Zoo on June 5, 2012 in Beijing, China. With an estimated 1,600 living in the wild, the endangered giant panda dwell in a few mountain ranges in central China, in Sichuan, Shaanxi, and Gansu provinces. (Photo by Lintao Zhang)

Justin Bieber performs live at the 02 Arena on March 14, 2011 in London, England.