How Fast Can Man Run?

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From The Daily Mail:

As Jamaican sprinter Usain Bolt smashes his own world record, are there ANY limits to what the human body can achieve?.

The question is, just how fast can he go? We asked this back in August last year when he smashed his own 100metres world record at the Beijing Olympics.

Then, he did it in 9.69 seconds, but his insouciant, hands-aloft stroll over the finishing line made many suspect that there was more to go.

And on Sunday, a year to the day after setting that extraordinary record in China, Usain Bolt showed that there was - more than a tenth of a second, in fact. Now, if he could only sort out his dodgy start, he might be able to break the record once more.

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