4.09 seconds
The fastest child on earth is 7.4
THe world record for fastest texting is 140 characters in 40 seconds
Green's fastest recorded 40 time is 4.09 seconds. ------------------------- Green's fastest unrecorded 40 time is 3.81 seconds.
3.8 seconds
the fastest man alive can run it in 3.46 seconds from a running start
The Whippet is the fastest dog. It can can run about 40 miles per hour.
4.28 maybe
4.40
4.3
The fastest offensive lineman of all time is a contemporary left tackle for the new England patriots. Kauzer ran a 4.43 40.
His 5.0 40-meter dash translates to a time of 4.572 seconds in the 40-yard dash.
The fastest men's time recorded at London was run in 2011 by Emmanuel Mutai in a time of 2:04:40.