There's a lot of press going around about how when CERN brings up the Large Hadron Collider (LHC) this week, the planet will vanish into a newly-created black hole. As someone who has worked in Beam Control at CERN in the very distant past, and whose code may be used in some of the post-processing phases it is worth reassuring the readers that this will not happen.
The LHC has been built to collide Hadrons, large particles that have been spun up to very high speeds/masses, so that when they hit the other particles head on there is a lot of energy in the collision, energy which may, sometimes, result in the appearance of previous hypothesised but never seen particles.
This is what the fear is about -that humanity will create new particles that will destroy us. It will not happen. The duration of these particles will be incredibly small, otherwise there would be many leftover particles from the time of the big bang. Furthermore, any new ones created from cosmic-ray collisions with the planet in the distant past would have left some traces. Therefore it is believed that the to-be-created particles will only exist within one of the detectors (ATLAS being the primary UK experiment) long enough to be picked up, and even its evaporation measurable.
Yes, CERN may finally create evidence that the hypothesised "FirstBus No.77 Bus" does actually exist putting to rest forever the Copenhagen Interpretation of this long standing physics problem, namely that cities are only for bicycles.