Over the last few weeks I have been binge watching YouTube videos about prehistory. I haven't been taking notes, simply immersing myself in the latest content with a special focus on the latest results from DNA analysis. I suppose this approach lacks rigour, being more akin to the last minute approach I used to follow to get through exams, but I find that it works for me in providing structure and generating thoughts and linkages.
As I listened, I thought how much our knowledge had changed and just how quickly.
This is a video of a talk given by Professor David Reich last year at Harvard: "Who we are and how we got here - Ancient DNA and the new science of the human past". This the second presentation I have seen on the same topic by Professor Reich, this is the link to the first. Both presentations follow the release of his 2018 book of the same title.
The book has attracted some criticism not so much on the science but on some of the wording used. I haven't read the book, it seems to have got caught up in current preoccupations about language, but the presentation strikes me as scientifically rigorous and indeed quite fascinating. It's quite a long video, over an hour, but will give you an insight into the way that scientific research is challenging our deeply held perceptions about the human past.