TED talks - summary writing

What happened at the Large Hadron Collider

1The LHC is a circular tube built under ground at Geneva. 2/ It is 27 kilometres long and the tube is 44 metres wide.  3/ Particles are sent around the LHC at great speeds to try to create the same conditions that existed one billionth of a second after the Big Bang.  4/ When it was switched on for the first time it was a success, but then there was a problem.  5/ Some of the superconducting gold wires had a defect which caused them to heat up.  50 of the 20 ton magnets were damaged.  6/ They are now repaired and the LHC is ready to begin further experiments.