"Our Technologies Establish the Truth of many of our Scienttific Laws." Is there any Comparable means of Establishing Moral Rules and Norms?

Throughout the history of science, there have always been experiments to verify scientific theories. For example, after having cried "Eureka", Archimedes would have set about confirming that the weight of a body immersed in fluid is equal to the weight of the fluid it has displaced . However, when Newton thought that an object's acceleration due to gravity was constant, he could not easily test this at the time. When Einstein conjectured that energy and mass …

…is no means of establishing this in the same way that technology is a means of establishing scientific theories. The idea that society's general consensus can go some way to establishing a moral norm is an attractive one, but the ever-changing nature of human behaviour calls into the question the validity of this method - after all - who's to say whether in a century's time, we will view thieves with more contempt than murderers?