The first spacecraft to land successfully on Mars has started its programme of research. America's Viking 1 is now standing on the Martian surface, sending back information direct from that strange, rugged landscape. For the first time we have been able to see close-range views from the one world in the solar system which has always been regarded as being possibly able to support life. To give the latest news about Viking and the search for life on Mars, Patrick Moore is again joined by Professor Geoffrey Eglinton and Dr Garry Hunt.