The planet's most powerful particle smasher failed in its first attempt to start in September 2008 due to an explosive release of helium caused by a faulty electrical cable.

The accident caused overheating in one of the tunnels.

Since then, scientists have been repairing electrical connections in anticipation of the restart.

The repair price tag was nearly 60 million dollars. Scientists will be attempting to collide protons at seven-trillion electron volts under half the energy the accelerator can produce.

The LHC could allow scientists to recreate the moment that existed a trillionth of a second after the big bang and could prove the existence of the so-called "God Particle" which gives everything mass.

Scientists also hope the LHC can determine the nature of dark matter and dark energy and settle the question of whether extra dimensions exist.

The LHC is located at the CERN laboratory beneath the France-Switzerland border near Geneva.

(Copyright 2009 by VERTEXNews/Newsroom Solutions)