For most of human history, which goes back hundreds of thousands of years, our past has been close to box. Carbon dating can tell us about a rough age of something, but altogether, the story they tell is incomplete. After drilling into forty thousand year old bones, scientists were finally able to sequence the entire genum of an ancient person. This was an earthquake. But it also just blew up a lot of what we thought we understood over the last decade. It's unexplainable.