Ripley's Believe It or Not by Ripley’s Believe It or Not! for January 10, 1997

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    TerryMeehan  about 4 years ago

    Wikipedia: Using the original report as a basis, Langmuir estimated the deer botfly’s true speed at a more plausible 25 mph/40kmh. Time magazine published an article in 1938 debunking Townsend’s calculations. To maintain a velocity of 800 miles per hour, the 0.3-gram fly would have had to consume more than 150% of its body weight in food every second; The fly would have produced an audible sonic boom; The supersonic fly would have been invisible to the naked eye; and The impact trauma of such a fly colliding with a human body would resemble that of a gunshot wound.

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