But 100 metres underground, it is a cathedral to science. I was able to go into the heart of the LHC, to one of the giant detectors that made one of the biggest discoveries of our generation, the Higgs Boson, a subatomic particle without which many of the other particles we know about would not have mass. The Atlas detector is 46m long and 25m high. It is one of the LHC"s four instruments that analyse the particles created by the LHC.