I thought this was quite interesting - weren't the mesolithic spearheads they brought up from the North Sea beautiful objects? The part where they demonstrated how long ago 700 thousand years was by using the full length of a football pitch (1 step = from us to the neolithic) was a good touch too. It is strange to think that we believe this is How Things Are, yet only a few thousand years ago the coastline was utterly different and there was all this land connecting us to the continent. They also claimed that the inundation of that land (the most recent time) would have been very fast, the water moving several metres every day. Strange times.