Canadian teenager smashes 400m freestyle swimming world record

Teenage swimmer Summer McIntosh smashed the 400m freestyle world record, shaving more than three-tenths of a second off the previous mark at the Canadian National Trials at the Toronto Pan Am Sports Center.

source https://www.cnn.com/2023/03/29/sport/teenager-summer-mcintosh-breaks-world-record-intl-spt/index.html