Prince Charles, wearing traditional Saudi attire, attends a sword dance in RiyadhReutersGerman Chancellor Angela Merkel watches a dance performance during a reception for carnival societies at the Chancellery in BerlinReutersMariah Carey visits The Tonight Show Starring Jimmy Fallon at Rockefeller Centre in New YorkGettyMasked members of Pussy Riot leave a police station hours after they were detained in Sochi, where Russia is holding the 2014 Winter OlympicsReutersA tail trails behind a runaway pulsar. The tail stretches for 37 light years, making it the longest jet ever seen from an object in the Milky Way galaxyREUTERS/NASA/CXC/ISDC/Handout via ReutersFireworks explode near anti-government protesters during clashes with riot police at Independence Square in KievReutersAnti-government protesters climb from a burning building during clashes with riot police in Independence Square in KievReutersAn anti-government protester stands near soldiers guarding a Defence Ministry compound, which is serving as a temporary office for Thai Prime Minister Yingluck Shinawatra, in BangkokReutersA soldier stands guard as anti-government protesters gather at a Defence Ministry compound in north Bangkok, which is serving as a temporary office for Thai Prime Minister Yingluck ShinawatraReutersAnother snowboarder is seen reflected in the visor of Canada's Matthew Morison during the men's snowboard parallel giant slalom qualification run at the 2014 Sochi Winter Olympic Games in Rosa KhutorReutersIce covers the shoreline of Lake Michigan in Chicago, Illinois. This winter's prolonged cold weather has caused more than 88% of the Great Lakes to be covered in iceGettyA lone snowman sits in Central Park in New York CityGettyWater surrounds the flooded and largely evacuated village of Moorland on the Somerset LevelsGettyA man sits next to a window of a restaurant on the 70th floor of a skyscraper in Guangzhou, Guangdong province, ChinaReutersCrew members of the Queen Mary 2 take part in an official portrait on the ocean liner's bow to celebrate the ship's 10th anniversary, in Sydney HarbourReutersCastaway fisherman Jose Salvador Alvarenga sits with his father, mother and other family members in San Salvador. He says he spent 13 months adrift in the Pacific Ocean, surviving on turtle blood and fish and birds caught with his bare hands. He vowed he would not venture back out to sea as he left hospital todayReutersAsylum seekers take part in a day of protest at the Holot detention centre in the southern Negev desert of Israel. More than 50,000 African migrants are seeking asylum in IsraelGetty