Back when Alta Vista was how you found facts online, I came across the word 'tachyon' and asked Alta Vista what the hell it was. Alta Vista led me to an article about the European scientist (I don't recall what country) who had been awarded a Nobel Prize for the discovery of tachyons, which are simply items that move faster than the speed of light.
...IT SAID IT RIGHT THERE ON THE INTERNET...!!
The article gave the year of the award... Being of a suspicious nature, I again resorted to Alta Vista and got a list from the Nobel people of all the award winners. Lo and behold there was no award given ANY year to the named scientist.
I was shocked! Shocked and appalled!
Tachyon is just an invented word for a theoretical situation. Of course, given the distance between Earth and the star Kolob, tachyons HAVE to exist, ¿que no? And they make buses out of tachyon materials...