there's a guy doing G-measurements at really small scales here:http://www.stanford.edu/group/kgb/Research/gravity2.html http://www.stanford.edu/group/kgb/Resear

there's a guy doing G-measurements at really small scales here:http://www.stanford.edu/group/kgb/Research/gravity2.html http://www.stanford.edu/group/kgb/Research/gravity2.html i'm still astounded at just how good the 1/r^2 relationship has held up for what? 300 years?