Good morning, here's some UFO math:
"The object was 40 ft long and [went] from 28k feet to sea-level in 0.8 seconds. This means it was capable of achieving a velocity of at least 23,864 mph, which is 31x the speed of sound—and 20x faster than a F-18"
The difference in speed between a horse and an F-18 is 22x. So, roughly, the UFO was to a 21st century supersonic jet what a supersonic jet would have been to 11th century transportation technology.
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