Australia's Stephanie Rice (L), Bronte Barratt (C) and Kylie Palmer congratulate celebrate after team Linda Mackenzie arrivied first in the women's 4 x 200m freestyle relay swimming final at the National Aquatics Center during the 2008 Beijing Olympic Games in Beijing on August 14, 2008. Australia set a new world record in the women's 4x200 metres freestyle relay with a time of seven minutes 44.31 seconds in the final at the Beijing Olympics on Thursday. The United States held the previous record at 7:50.09 at last year's world championships in Melbourne. [Agencies]