Australia broke the world record in the women's 4x200m freestyle relay at the Commonwealth Games in Birmingham on Sunday.
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The team of Madison Wilson, Kiah Melverton, Mollie O'Callaghan and Ariarne Titmus powered home in 7min 39.29sec to beat China's previous mark of 7:40.33.
Canada took silver and England won bronze.
Fifteen-year-old Summer McIntosh got Canada off to a flyer at the Sandwell Aquatics Centre, but Melverton established a lead for Australia that they never relinquished.
Two-time Olympic champion Titmus powered through her leg to break the record, which was set at last year's Games in Tokyo.