https://en.m.wikipedia.org/wiki/Exotic_matter#Negative_mass https://en.m.wikipedia.org/wiki/Exotic_matter#Negative_mass The cancle out your talking about is wh

https://en.m.wikipedia.org/wiki/Exotic_matter#Negative_mass https://en.m.wikipedia.org/wiki/Exotic_matter#Negative_mass The cancle out your talking about is what happens with magnets and dipoles. What if negative mass was a monopole? Testing the theory would be be the same kind of tests created for testing the Big Bang.