05-18-18. David Toomey, Ph.D., UMass-Amherst. The speculations of Einstein, Thorne and other scientists about time-travel. We learn also how science fiction contributed to the development of the time-travel concept.
05-18-18. David Toomey, Ph.D., UMass-Amherst. The speculations of Einstein, Thorne and other scientists about time-travel. We learn also how science fiction contributed to the development of the time-travel concept.