Fireworks explode over a floating Christmas tree in Lagoa Lake in Rio de Janeiro. (Photo by Victor R. Caivano/Associated Press)

A Chimpanzee opens its Christmas presents at ZSL Whipsnade Zoo on December 17, 2013 in Bedfordshire, England. (Photo by Tony Margiocchi/Barcroft Media)

A Palestinian youth practices his parkour skills at Shati refugee camp in Gaza City April 27, 2014. (Photo by Mohammed Salem/Reuters)

The 33-year-old Norwegian rightwing extremist Anders Behring Breivik, who killed 77 people in twin attacks in Norway last year, arrives at a courtroom. (Photo by Heiko Junge/AP File Photo)

These photos and video were taken in the Russian city of Astrakhan on the evening of June 7th, 2012. (Photo by Maxim Korotshenko)

Underwater with Photographer Caelum Mero. (Photo by Caelum Mero)

This young boy wrestled with his emotions at the National Children’s Sumo ­Tournament in Tokyo on July 30, 2012. (Photo by AP Photo/LaPresse)

Old Heidelberg, Dog with Pipe, 1905. (Photo by Detroit Publishing Company)