Long before the Egyptians began the pyramids, Neolithic man built a vast temple complex at the top of what is now Scotland. Robin McKie visits the astonishing Ness of Brodgar
Piltdown Man: British archaeology’s greatest hoax
When the find was revealed to be a ‘cheap fraud’, several eminent men – including Sir Arthur Conan Doyle – were put in the frame. Now scientists aim to put an end to the mystery once and for all