the summit on the morning of July 31 after a 32-day climb in sub-zero temperatures. He was accompanied by an international team of 10 other climbers. World records In December 2005, broke the Guinness World Record of the Longest Scuba Submergence (controlled environment). Khoo spent 220 hours underwater as opposed to the previous record of 212.5 hours. The record was subsequently broken on August 30, 2009 by Cem Karabay and now stands at 240 hours. Personal life Khoo was born on 16 November 1964 in Port Dickson, Malaysia and became a Singaporean in 1999. Bibliography In August 2003, Khoo published his first book called Journeys to the Ends of the Earth. His second book Singapore to Beijing on a Bike was published in June 2007. Everest summits Mount Everest summits of Khoo Swee Chiow (Swee-Chiow Khoo) May 25, 1998 May 23, 2006 May 21, 2011 See also List of Mount Everest summiters by number of times to the summit References External links Khoo Swee Chiow's official website Khoo Swee Chiow's Profile on Everest News Adventurer Khoo Swee Chiow reaches top of K2 Singaporean mountain climbers 1964 births Living people Singaporean people of Chinese descent Summiters of Mount Everest Explorers of Antarctica Malaysian emigrants to Singapore Mount Ararat