Lots of people believe, that the "Large Hadron Collider", will destroy the world, similarly to making a wee version of a sun using 192 uber powerful lasers (see the article for more information) by 2022.
Also, an extremely popular video explaining in vague details what the LHC does can be found here.
A pretty good video proving the LHC conspiracy is "Science!" (though it goes off topic quite a bit).
