A hypothetical subatomic particle that travels faster than light, predicted by some extensions of special relativity but never observed.
From Greek 'tachys' (swift) + '-on' (particle suffix). Coined by physicist Gerald Feinberg in 1967. If they exist, they would experience time in reverse — arriving before they leave.
A PARTICLE THAT GOES FASTER THAN LIGHT — if it exists! And here's the mind-bender: it would travel BACKWARD in time, arriving before it left! Physics at the edge of imagination! Einstein would have had QUESTIONS! 🚀â°
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