carnival celebrations at the Sambadrome in Rio de Janeiro, Brazil, Feb. 21, 2012. (Victor R. Caivano, AP)A woman experiences the ‘Rain Room’ art installation by ‘Random International’ in The Curve at the Barbican Centre on October 3, 2012 in London, England. The ‘Rain Room’ is a 100 square meter field of falling water which visitors are invited to walk into with sensors detectingIn this image provided by NASA the Expedition 32 crew onboard the International Space Station, flying an altitude of approximately 240 miles, recorded a series of images of Aurora Australis, also known as the Southern Lights, on July 15, 2012. NASA astronaut Joe Acaba, flight engineer,Indians feed birds from a boat on the River of Yamuna as it is enveloped by winter morning fog in New Delhi, India, Friday, Jan. 20, 2012. (Kevin Frayer, AP)Best Photos 2012 Hindu devotees take part in worship on the banks of the River Ganges river during Chhath festival, an ancient Hindu festival, rituals are performed to thank the Sun God for sustaining life on earth, in Patna, India, Monday, Nov. 19, 2012. According to local news reports, a bridge made of bambooA Japanese snow monkey relaxes in a hot spring in the Jigokudani valley in northern Nagano Prefecture in Japan Friday, Feb 10, 2012. The macaques descend from the forests to the warm waters of the hot springs in the mornings, and return to the security of the forests in theThe Chinese team’s performance win the gold medal during the teams free final synchronized swimming at the 9th Asian Swimming Championships, in Dubai, United Arab Emirates, Sunday, Nov. 18, 2012. (Hassan Ammar, AP)Syrian man cries while holding the body of his son near Dar El Shifa hospital in Aleppo, Syria, Wednesday, Oct. 3, 2012. (Manu Brabo, AP)