Andrew Higgins, a 10th-level mechanical engineering wizard, looked at the iconic eagle logo of the US Postal Service. He calculated that the physical properties of eagle in flight indicate an air speed of Mach 4.9, which is 3,760 miles per hour.
The Twitter thread continues with Higgins discussing the issue with other mages who have delved into the gnostic arcana of mathematics and physics. I assume that it's an intelligent discussion.
-via Super Punch
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If only they could deliver the mail that fast!
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