I watched a programme the other night about Erich von Daniken, the author of "Chariots of the Gods?", who died earlier this year. I remember reading the book when I was about 18 and was fascinated by it. A lot of it is absolute tosh but it did raise some intriguing questions. I certainly don't believe, as he did, that aliens were involved in the construction of places like the pyramids and Stonehenge but how and why they were built still remains a matter of huge debate. Archaeologists today accept that some of the massive stones used at Stonehenge came from Wales with no idea how they were transported. They now also believe that some of the other stones came from Aberdeenshire in the north of Scotland---which is even harder to explain.
I remember consoling myself, as that teenage reader, that the truth would surely emerge during my lifetime. I'm running out of time!