Scientists Restart Large Hadron Collider in Quest for Dark Matter

Deep underneath the Alps, on the Swiss-French border, something significant just happened in the world of physics. The Large Hadron Collider, Earth's most powerful particle accelerator, was restarted on Friday morning after a three-year hiatus for upgrades. From a report: Consisting of a ring 27 kilometers (16.7 miles) in circumference, the machine is made of superconducting magnets chilled to 271.3C (-456 F) -- which is colder than outer space. It works by smashing tiny particles together to allow scientists to observe them, and to see what's inside. It may sound like the stuff of science fiction, but the revamped collider will ultimately allow mankind to observe dark matter, physicists hope. Back in 2011 the Large Hadron Collider, located 100 meters underground at the European Organization for Nuclear Research (CERN), helped scientists prove the existence of an subatomic particle called the Higgs boson -- which is thought to be a fundamental building block of the universe dating back to the Big Bang billions of years ago. CERN said on its website that the collider magnets "squeeze" tiny particles causing them to crash together, which scientists then observe. These particles are so tiny, CERN said, that lining them up to smash together is "akin to firing two needles 10 kilometers apart with such precision that they meet halfway." Improvements to the collider mean scientists will be able to study the Higgs boson in "great detail," CERN said in a press release Friday.Now a team of experts hope to be able to collide yet more particles together with the aim of understanding the mysteries of dark matter -- an invisible and elusive mass that can't be seen because it doesn't absorb, reflect or emit any light.

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