Why Aussie swimming queen retired at her peak?

IMAGE: Ariarne Titmus of Australia her third individual Olympic gold medal in a 400m freestyle final dubbed ‘the race of the century’. Photograph: Clodagh Kilcoyne/Reuters Australian......

PIX: Ledecky wins record-equalling ninth swim gold

Images from the Olympics swimming action at the La Defense Arena, Paris, on Saturday. IMAGE: Katie Ledecky of the United States celebrates with Australia's silver medallist Ariarne Titmus after......

World Swimming Championships: Ledecky breaks 800m freestyle world record

Gold medallist Katie Ledecky of the United States poses with silver medallist Lauren Boyle of New Zealand and bronze medallist Jaz Carlin of Great Britain during the medal ceremony in the Women's......

World Swimming: Ledecky breaks 1500 metres freestyle world record

Gold medallist Katie Ledecky of the United States (center) poses with silver medallist Lauren Boyle of New Zealand and bronze medallist Boglarka Kapas of Hungary during the medal ceremony for the......

PIX: Ledecky wins 19th gold; butterfly double by Milak

With her 19th FINA World Championships gold medal, Katie Ledecky is now within seven of Michael Phelps's all-time record. IMAGE: Katie Ledecky of the United States shows off her medal from the......