The Large Hadron Collider (LHC) is a particle accelerator which will probe deeper into matter than ever before. Due to switch on in 2007, it will ultimately collide beams of protons at an energy of 14 TeV . Beams of lead nuclei will be also accelerated, smashing together with a collision energy of 1150 TeV.
A TeV is a unit of energy used in particle physics. 1 TeV is about the energy of motion of a flying mosquito. What makes the LHC so extraordinary is that it squeezes energy into a space about a million million times smaller than a mosquito.
Housed 100-kilometers below the earth, the LHC is currently being built by CERN.

It's a series of tubes.

The Large Hadron Collider (LHC) is the world's largest and highest-energy particle accelerator complex, intended to collide opposing beams of protons (one of several types of hadrons) with very high kinetic energy. Its main purpose is to explore the validity and limitations of the Standard Model, the current theoretical picture for particle physics. It is theorized that the collider will confirm the existence of the Higgs boson, the observation of which could confirm the predictions and missing links in the Standard Model, and could explain how other elementary particles acquire properties such as mass.

The LHC was built by the European Organization for Nuclear Research (CERN), and lies underneath the Franco-Swiss border between the Jura Mountains and the Alps near Geneva, Switzerland. It is funded by and built in collaboration with over eight thousand physicists from over eighty-five countries as well as hundreds of universities and laboratories. The LHC is operational and is presently in the process of being prepared for collisions. The first beams were circulated through the collider on 10 September 2008, and the first high-energy collisions are expected to take place after 6-8 weeks.

The LHC12 is the world's largest and highest-energy particle accelerator. The collider is contained in a circular tunnel, with a circumference of 27 kilometres (17 mi), at a depth ranging from 50 t...

A device that when used has the potential to create miniature black holes. Physicist have assured us that this is of no concern, though, for two reasons. One is that these black holes are supposed to evoporate due to Hawking Radiation, which is an unobserved theory. And the other is that if the LHC is capable of producing black holes, cosmic rays should produce miniature black holes frequently when they collide with the atmosphere, which totally ignores the fact that these natural miniature black holes would have velocities much greater than the Earth's escape velocity. So there is a distinct possibility that when this collider fires up in 2007, the Earth could be doomed to be slowly accreted by miniature black holes at the center of the earth. However, you can rest assured that the physicists that are willing to gamble with the functional existence of Earth on the basis that this scenario will not happen do not seem to care.

Worlds largest particle accelerator built on the border of Switzerland and France 150 meters (164 yards for Americans) under ground so that the scientist using it would forget the fact that they don't have a girlfriend.

It has the potential to destroy all life on Earth, but the scientist assure us that everything will be ok.

If you're reading this, it means that the experiment went ok (by the time this is published September 10, 2008 will pass).