what is the worlds biggest physics experiment?

Question: what is the worlds biggest physics experiment?
- Keywords:
  biggest,
  experiment,
  research
Asked by Chloe to Rob, Anna on 12 Nov 2014.
- Rob Appleyard answered on 12 Nov 2014:
  
  The Large Hadron Collider, which is the experiment whose data I look after. It’s a machine which smashes particles together at nearly the speed of light, cost £6,200,000,000 to build, and is housed in a tunnel 17 miles around.

Question: what is the worlds biggest physics experiment?