The Royal Institution Annual Christmas Lectures to Young People. A series of six programmes 3:The History of Mars
The ' Red Planet' has a very special fascination for sky-watchers and in this third lecture Professor Carl Sagan explains entertainingly how it was that, exactly 100 years ago, civilised life was discovered on Mars, only. to be ' undiscovered' more recently.
Presented for television by STUART HARRIS and KARL SABBAGH