A machine of this incredible size and power can be prudent. The intense particle beam so building the LHC tunnel was could drill a hole in just about anything. There also concerns that the LHC experiments could create un discoveries, such as particles and other strange phenomena that could destroy Earth or even the universe. For ample, one nightmare scenario is that the lisions could pack matter together so that it collapses to form miniature black holes Black holes are unimaginably dense points in space whose gravity is so strong it can pull in entire planets or even stars. The black holes could pull in our entire planet, eventually crushing it down to a size smaller than a pea.