http://www.nytimes.com/2008/03/29/science/29collider.html?_r=1&hp&oref=slogin

'...the collider could produce, among other horrors, a tiny black hole, which, they say, could eat the Earth. Or it could spit out something called a “strangelet” that would convert our planet to a shrunken dense dead lump of something called “strange matter.” '

The CERN proton collider, could it dissapear the Earth into a blackhole or make it a collapsed lump of strange matter?  

This reminds me of the rumor about scientists who worked on  the manhattan project betting wether or not the atomic bomb test would start a chain reaction in the atmosphere.

Martin J. Sherwin: There are two stories that we tell in American Prometheus that are relevant. In 1942 Teller did some calculations indicating that an atomic bomb might lead to a chain reaction in the atmosphere. Oppenheimer immediately took this news to Arthur Compton at Chicago and they discussed it. Hans Bethe redid Teller's calculations and proved that he had made errors (which was not unusual as it turns out.) Then before the Los Alamos tests (allegedly) Fermi took side bets that New Mexico would be incinerated. (Frankly, I don't believe that story despite the fact that it has been told and retold. I don't believe that anyone was so close to the test of July 16 that they were effected by radiation.

 Oh well, it was a nice planet while it lasted, hehey.