It was inevitable that if there were found to be serious flaws in our physics and in our understanding of gravity or such things as 'momentum' these would be quickly revealed beginning in the early 1970s, when human beings first began to explore space.
A new summation of this theory and a set of proposed experiments to test the predictions of the Unified Field Theory is found here..
http://www.awitness.org/unified/pages/new_physics.html