Super colliders are already massive. The Large Hadron Collider in Switzerland features a circular track over 16 miles long. Today, Chinese state media announced the nation's plan to construct a super collider twice as large, with construction beginning in 2020. Like the Swiss project, it will smash particles together looking for the elusive snowflake that is the "God Particle". Unlike the CERN project, it will do so with a ton more energy.