There have been some recent experiments and proposals looking for discreteness of space: http://backreaction.blogspot.com/2015/12/what-fermilabs-holometer-expe

There have been some recent experiments and proposals looking for discreteness of space: http://backreaction.blogspot.com/2015/12/what-fermilabs-holometer-experiment.html http://backreaction.blogspot.com/2015/12/what-fermilabs-holo... https://www.space.com/29629-quantum-foam-bubbly-universe-search.html https://www.space.com/29629-quantum-foam-bubbly-universe-sea...