Any proof that tachyons exist?
by 
Dontbeignorant
ANSWERS: 2
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Is there any proof that anything exists?
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Ask most physicists about tachyons, however, and you'll be told that they belong strictly in the realm of science fiction. That skepticism is understandable, since nearly all experiments searching for tachyons have so far turned up negative. Even worse, according to some physicists, if tachyons exist, they could be used to send messages back in time. Nevertheless, over the years a few physicists have held out hope that tachyons might actually exist --possibly disguised as some other known particle.
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