We quest for astronauts of the gods to do all these things, because we don't understand how sophisticated our ancestors were.
Could our ancestors have built the great stone circles at Avebury and Stonehenge? Could they have used them as astronomical observatories to plot the motions of the sun and stars? John Maddox discusses the evidence for megalithic astronomy with Dr Ed Krup, Director of the Griffiths Observatory in Los Angeles, and Dr Tony Aveni of the Colgate University in New York.
