Ever since Einstein showed it was theoretically possible, the quest to travel through time has drawn eccentric amateurs and brilliant scientists in almost equal numbers. The amateurs include Aage Nost, who demonstrates his time machine in front of the cameras. The professionals include the likes of Professor Frank Tipler of Tulane University. His time machine sounds good – but it would weigh half the mass of the galaxy.
evolution south asia ruins economics big business architecture environmental technology PBS travel nature biography History Channel uk music video china Channel 4 africa HD art news BBC antiquities race/ethnic relations mini-documentary rock east asia us documentary beliefs archaeology food politics latin america human southeast asia middle east war live india music global band drugs short-clips europe science asia history national geographic
The Science of Discovery