Large Hadron Collider

The Large Hadron Collider is the world's largest and most powerful particle collider and the most complex experimental facility ever built and the largest machine in the world. It was built by the European Organization for Nuclear Research between 1998 and 2008 in collaboration with over 10,000 scientists and hundreds of universities and laboratories, as well as more than 100 countries. It lies in a tunnel 27 kilometres in circumference and as deep as 175 metres beneath the France–Switzerland border near Geneva.