9.58, and a world record that has now stood for seventeen years
Usain Bolt ran the 100 metres in 9.58 seconds in Berlin in August 2009, taking eleven hundredths off his own record. Nobody has been within a tenth of it since.
Athletics
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1:59:40 in Vienna, and why it was never going to be a world record
Eliud Kipchoge ran a marathon distance in under two hours in October 2019. The conditions that made it possible are exactly the ones that disqualified it.