Back on the subject of our ancestors I think that there must have been far more people around than they say. Communication between them must have been good otherwise they wouldn't have been able to organise the big events that they had. There must have been stone reps travelling between them. " Got just the right stones for you, blue stones from Wales, not far away!"
How on earth did they manage to convince the wife and kids to walk all the way from Scotland to Salisbury Plain with kids asking"Are we there yet?" All the way? How did they know where to go and how long it would take? That's a lot of sandwiches to take!