Olympic gold medalist Florence "Flo-Jo" Griffith Joyner died 25 years ago on Sept. 21, 1998. The sprinter's world records for the 100 meter and 200 meter events remain unbroken.

Katie Ledecky clocked in about 10 seconds faster than the world record for the 1,500 meter "short course" freestyle race on Day 2 of the Swimming World Cup in Toronto.

It's been an astonishingly successful Games for the 24-year-old from Florida. He added two gold medals to his haul from the Tokyo Olympics, departing the Games with five golds.

In addition to smashing a longtime world record, Tatjana Schoenmaker took home South Africa's first gold medal of the Tokyo Games.

The famed naturalist and broadcaster beat out actress Jennifer Aniston for fastest time to reach one million followers on Instagram, according to Guinness World Records.