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摘要

A butcher's shop may be the last place where you would expect to come across nutty physics theories. Nevertheless, it was at his local butcher's in East Sussex, south-east England, that Jeremy Drew and his son picked up a postcard flyer headed "Tachyon energy". Yes, folks. Tachyons are back, together with their usual baffling claims.rnThe flyer explained that tachyon energy "differs from other forms of energy in that it is not of the electromagnetic realm". Quite so. Nor is it of any other realm that we know of, since the particles named tachyons are, as we reminded readers when we first came across this particular form of fruitloopery (9 July 2005), entirely hypothetical and have never been shown to exist.