Using Square Grader data spanning only 4 days, I've found at least 3 individuals in the United States who seem to be capable of traveling in excess of the speed of sound.

For now, I'm keeping the identity of these special individuals a secret to allow for greater observation and study. I have a feeling that there may be many more super human Foursquare users, and I'll let you guys know what I find.

The Science of ReTweets With Dan Zarrella

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Originally published May 20, 2010 7:00:00 AM, updated October 20 2016