This picture taken on January 17, 2013 shows 77-year-old retired teacher Gao Yinyu exercising in his underwear at a snow-covered bathing spot in Jilin, in northeastern China's Jilin province, in a temperature of minus 25 degrees Celsius. Gao has been exercising in only his underwear every morning for more than the past decade and has rarely caught cold ever since retirement. CHINA OUT AFP PHOTO
Models walk the runway during the Maison Martin Margiela Spring/Summer 2013 Haute-Couture show as part of Paris Fashion Week at on January 23, 2013 in Paris, France.
Credit: Richard Bord
Atmosphere backstage before the Maurizio Galante Spring/Summer 2013 Haute-Couture show as part of Paris Fashion Week at Theatre du Chatelet on January 21, 2013 in Paris, France.
Credit: Pierre-Henri Pham
Andy Murray of Great Britain signs autographs after winning his fourth round match against Gilles Simon of France during day eight of the 2013 Australian Open at Melbourne Park on January 21, 2013 in Melbourne, Australia.
Credit: Lucas Dawson
Peter Mel competes during the first heat of the Mavericks Invitational surf competition on January 20, 2013 in Half Moon Bay, California.
Credit: Ezra Shaw
A Russian Orthodox believer reacts to the water temperature during Orthodox Epiphany celebrations in the icy-cold water of the lake in Yaroslavl region, 260 km. North of Moscow on January, 19, 2013 in Russia. People all over Russia are taking part in a baptism ceremony, one the biggest events in the Christian Orthodox calender.
Credit: Sasha Mordovets
Claire Arthur of Australia competes in the Women's Individual Trampoline during day four of the Australian Youth Olympic Festival at Sydney Olympic Park Sports Centre on January 19, 2013 in Sydney, Australia.