A four-month-old North American cougar cub looks on inside its open-air enclosure in the Royev Ruchey zoo on the suburbs of the Siberian city of Krasnoyarsk, Russia, February 11, 2016. Cougars Ice and Arnaldo, who were both born at the zoo, gave birth to two cubs, according to employees. (Photo by Ilya Naymushin/Reuters)
