We're pretty sure the speed of sound is still out of his reach though.
Yet, without much effort, Bolt could run even faster, according to new calculations. With a few slight but still-legal boosts from tailwinds, altitude and a better reaction time at the start, argues Cambridge University mathematician John Barrow, Bolt could easily clock in at 9.45.
the statistic of 1 in 50,000 deaths has not changed. Why we hear about this more often is that more and more people are doing marathons and half marathons. Causes and solutions are hypothetical and anecdotal at best as we all wait for multi-institution good research to give us definitive answers.