Our physics research group performs modern precision experimental tests of the theories of gravity and particle physics. Our workhorse technology remains the to

Our physics research group performs modern precision experimental tests of the theories of gravity and particle physics. Our workhorse technology remains the torsion balance. http://www.npl.washington.edu/eotwash/experiments http://www.npl.washington.edu/eotwash/experiments There's no other method that can suspend so much material on such a weak spring with such tiny susceptibility to outside disturbances. Our experiments benefit from other technical developments from the last 300 years of experimental science, but it's like comparing modern aircraft to the Wright Brothers' first flight. The core ideas remain the same.