Nepalese climber Chhurim Sherpa, who holds the world record for women summiting Mount Everest twice in one climbing season on May 12, 2012 and May 19, 2012, poses with her Guinness World Record certificate in Kathmandu on February 25, 2013. A Nepalese was the first woman to climb Everest twice in a season, Guinness World Records confirmed Monday, scaling the world's highest mountain within a week.