Smithsonian National Zoo biologist Leigh Pitsko releases a male lion cub for its swim test in the zoo habitat moat, in Washington May 6, 2014. Four, unnamed ten-week old lion cubs were tested today for their ability to swim and remove themselves from their zoo habitat moat. (Photo by Gary Cameron/Reuters)

Emergency services continue to attend the scene of a multiple fatal collision near Junction 25 on the M5 motorway on November 5, 2011 near Taunton, England. At least 27 vehicles crashed on the northbound carriageway of the M5 near Taunton, causing several explosions. Police have confirmed that several people have been killed and 43 have been injured but emergency crews have as yet been unable to confirm cause of the crash. (Photo by Matt Cardy/Getty Images)

Model Heidi Klum and TV personality Nick Cannon speak onstage during Nickelodeon's 24th Annual Kids' Choice Awards at Galen Center on April 2, 2011 in Los Angeles, California. (Photo by Kevork Djansezian/Getty Images)

A golden huddle by Minqiang Lu, China. Two females and a male golden snub-nosed monkey huddle together to keep warm in the extreme cold. Threatened by forest loss and fragmentation, this endangered species is confined to central China. Restricted to living high up in the temperate forests, these monkeys – here in the Qinling mountains in Shaanxi province – feed mostly in the trees, on leaves, bark, buds and lichen. In heavy wind and snow, Minqiang walked up the mountain carrying his equipment. He stayed for half an hour in temperatures of –10C opposite the tree where the group was huddled before achieving this eye-level composition. (Photo by Minqiang Lu/Wildlife Photographer of the Year)

Breath of an Arctic fox by Marco Gaiotti, Italy. Marco was watching this little Arctic fox as it incessantly called another nearby. Gradually he noticed the fox’s wet breath was quickly freezing in the air after each call. It was late winter in Spitsbergen, Svalbard, and the air was -35C (-31F). Photographing Arctic foxes is often frustrating, as they are normally running around fast in search of food, but this one was very relaxed and let Marco get close enough to focus on it, with the light glowing perfectly in the background. (Photo by Marco Gaiotti/Wildlife Photographer of the Year 2021)

An injured supporter of Ivory Coast's Laurent Gbagbo reacts outside the premises of Hotel Golf, where Gbagbo is currently being held after his arrest, in Abidjan April 11, 2011. The trial of Laurent Gbagbo on charges of crimes against humanity during post-election violence, in which around 3,000 people were killed, will begin on January 28, 2016 at the International Criminal Court. (Photo by Reuters/Stringer)

“Google is launching balloons into near space to provide internet access to buildings below on the ground. About 30 of the superpressure balloons are being launched from New Zealand from where they will drift around the world on a controlled path. Attached equipment will offer 3G-like speeds to 50 testers in the country”. – BBC News. Photo: A Google balloon sails through the air with the Southern Alps mountains in the background, in Tekapo, New Zealand. (Photo by Jon Shenk/Associated Press)

A member of staff stands in front of a CRH high-speed train at Shanghai Hongqiao Railway Station during its test run on May 11, 2011 in Shanghai, China. After 3 years construction, from April in 2008, with total investment estimated at 220.9 billion yuan (around 32.5 billion U.S. dollars), the Beijing-Shanghai high-speed railway begins a one-month trial operation. It is expected to start operation in June this year, with the travel time between the two cities reducing to five hours from the previous 10. (Photo by ChinaFotoPress/Getty Images)