Original poster: dave pierson <davep-at-quik-dot-com> >Why? Einstein didn't build a single cyclotron to prove his theories Indeed. However there are many ways to test his theories. He proposed the observations/tests. Others (30 years pre cyclotron) MADE the observations. They matched the predictions. (and: Einstein had MANY ideas. MOST have stood up remarkably well. SOME have not. ) best dwp