Question

why is
the large hadron collider built underground​

Answer 1

Answer:

The Large Hadron Collider (LHC) is by far the most powerful particle accelerator built to date. ... The LHC allows scientists to reproduce the conditions that existed within a billionth of a second after the Big Bang by colliding beams of high-energy protons or ions at colossal speeds, close to the speed of light.