Ariarne Titmus set a new world record in the women’s 200-meter freestyle at Australia’s Olympic swimming trials on June 12. Her time of 1:52.23 seconds eclipsed the previous record by nearly two-thirds of a second. Titmus, already an Olympic champion in other events, achieved the feat in front of a hometown crowd, expressing surprise at the record-breaking performance. Her coach, Dean Boxall, played a crucial role in her preparation. Titmus and runner-up Mollie O’Callaghan are likely to lead Australia’s 4×200 freestyle relay team at the Paris Olympics.