Snow falls as boats move on the Schuylkill River in Philadelphia. (AP Photo/Matt Rourke)

A passenger train moves along the bank of the Yenisei River in the Siberian Taiga forest covered with snow and hoarfrost outside Krasnoyarsk, Russia. REUTERS/Ilya Naymushin

A protester jumps over a burning barricade during a protest against the government in the streets of Port-au-Prince, Haiti. REUTERS/Jeanty Junior Augustin

Members of the Chinese community celebrate the Chinese New Year, marking the entrance in the Zodiac year of the Pig with a traditional parade in via Paolo Sarpi in Milan. AFP / MARCO BERTORELLO

US singer-songwriter Lady Gaga performs onstage during the 61st Annual Grammy Awards in Los Angeles. AFP / Robyn Beck

Indian laborers select 'Mosambis' fruits, also called sweet oranges, at Gaddiannaram fruit market on the outskirts of Hyderabad. AFP / NOAH SEELAM

Two white rhinoceros look at each other in their enclosure at the zoo park of Lille, northern France. AFP / PHILIPPE HUGUEN