From Stonehenge to California and from Peru to Siberia, acclaimed sci-fi author Sir Arthur C. Clarke investigates the stories behind the world's most puzzling wonders that have baffled even the most logical and scientific of minds. Arthur C Clarke sets out to take away the confusion and try and find some reasonable explanation for some of the weirdest events ever known. Two years in the making, the series seeks out the strange and magnificent - how did frogs rain down on an English golf course? How do rocks move unaided across America's Death Valley? And what is the secret behind the Mitchell Hedges crystal skull?