nay nadine barber has more. >> back in action and more powerful than ever over the last two years, then busy upgrading the world's biggest particle accelerator deep under the swiss french border. on sunday scientists fired two particle beams around the 27 kilometer long circuit known as the large hadron clyder, the lhc. these are baby steps for researchers here at cern, the european organization for nuclear research. >> establishing the first stable collisions. we have to commission all of the instruments, all of the systems one by one. >> in 2012, cern announced an unexpected break through. scientificits finally, skofrnd the higgs bosson an elementary particle that gives mass to other particles earning it the next name, the god particle. the following years two of the scientists peter rigs and engleier got the nobleel prize in physics. >> the addams, there would be no molecules. building blocks for metal. there were, themselves also be no styles no galaxies no planetary system. there would be no earth and eventually there would be no life on earth. the lhc contains a ring of super cond