A recent message from the Chamber of Commerce in Washington, D.C. Mandel Ngan/AFP/Getty Images hide caption

A street child looks out from his classroom during studies conducted by the Salaam Baalak Trust at the New Delhi railway station in September 2004. Salaam Baalak Trust is an Indian charity for homeless children. Manish Swarup/AP hide caption

Songs by artists from Beethoven to Justin Bieber take on a cosmic quality when stretched to hundreds of times their original length. iStockphoto.com hide caption

The Reagan family gathers at the breakfast table in 1960. Their kitchen was stocked with General Electric gadgets, thanks to Reagan's hosting gig on GE Theater. Courtesy of Ronald Reagan Family hide caption

For Joyce DiDonato, switching genders is as easy as changing clothes. Courtesy of Virgin Classics hide caption