Michael Phelps Photos Photos: XII FINA World Championships - Day 11
Michael Phelps Photos Photos - Michael Phelps of the United States of America competes in the Men's 200m Butterfly semi final during the XII FINA World Championships at the Rod Laver Arena on March 27, 2007 in Melbourne, Australia. Phelps won the gold medal. - XII FINA World Championships - Day 11
U. Bolt...line and form..perfect
Morgan Mitchell of Australia prepares to compete in the Women's 400 meter…
Sprinting star Usain Bolts takes cosy boat ride with Morgan Mitchell
Australia's Taliqua Clancy plays a shot during the women's beach volleyball qualifying match between the Netherlands and Australia at the Beach Volley Arena in Rio de Janeiro on August 10, 2016, for the Rio 2016 Olympic Games. / AFP / Leon NEAL
Australia's Sally Pearson, left, is embraced by bronze medallist Kellie Wells of the United States after she won gold in the women's 100-meter hurdles final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Tuesday, Aug. 7, 2012.
The world's fastest man Usain Bolt could run even quicker without any extra fitness training, according to a leading mathematician.
A great race by the Aussie team in the team pursuit. It took a world record by Great Britain to relegate Australia to the silver medal. 3:50.265 was the winning time, Australia hit the line at 3:51.008. Alexander Edmondson, Jack Bobridge, Michael Hepburn and Sam Welsford of Team Australia on Day 7 of the Rio 2016 Olympic Games at the Rio Olympic Velodrome on August 12, 2016 in Rio de Janeiro, Brazil. #rio2016