joshmar

Carl Sagan, who died in December 1996, is one of the few scientists whose name has become a household word all around the globe. The first man to recognise and name the greenhouse effect, Sagan was a force behind the search for extraterrestrial...

Chronicles the astronomer's rise to scientific celebrity, describing his gift of enthusiastic communication and his conflicts with the academic establishment.

Presents a beginning language learning program designed to teach the listener French in progressive steps.