Was doing some reading on the LHC at CERN. It's kind of an interesting piece of kit, from the scale of the project, to the energies involved and the materials required (100 tonnes of superfluid helium 4 sounds like a laugh). But what is kind of more interesting is the implications of what it might uncover. But what's really interesting is the side effects and what might happen. Such as making mini black holey thingies.

Or, the safety concerns; (quoth wikipedia) 

As with the Relativistic Heavy Ion Collider (RHIC), people both inside and outside of the physics community have voiced concern that the LHC might trigger one of several theoretical disasters capable of destroying the Earth or even the entire Universe. These include: 

• Creation of a stable black hole^[7]
• Creation of strange matter that is more stable than ordinary matter
• Creation of magnetic monopoles that could catalyze proton decay
• Triggering a transition into a different quantum mechanical vacuum (see False vacuum)