3 minutes 43.13 seconds by Moroccan runner Hicham El Guerrouj
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The fastest try ever scored in the Six Nations was by Shane Williams for Wales against Scotland in 2008, taking just 1 minute and 45 seconds.
The record is just under 4 minutes, but not many men can run that fast! An athletic male should be able to do it in under six minutes. However, for the non-athletic or untrained male it could be nearer seven or even eight minutes. Depending on physical build, body fat, weight, health, stamina, practice and general fitness. For those who are not particularly athletic, running times can often be improved by a fitness regime and regular appropriate training. One month's good training can reduce an 8 minute mile to nearer six!
The distance of six blocks can vary depending on the size of the blocks but typically, a city block is around 1/10th of a mile. So, six blocks would be approximately 0.6 miles away.
The Calvin cycle needs to be run through six times to produce one molecule of glucose. This is because each turn of the Calvin cycle fixes one molecule of carbon dioxide, and glucose has six carbons in its structure.
Shahid Afridi holds the record for the longest six ever hit in a cricket match, which was estimated to be around 158 meters.