Australian swimmer Ariarne Titmus continued to post her name in history books as she broke USA's Katie Ledecky's world record in 400m freestyle women's swimming. She completed her course in 3 minutes 56.40 seconds which is just above Ledecky's 3 minutes 56.46, wow it is not just the game of seconds, it is a game of milseconds! She set this record during Australian swimming championships.