This feature aims to explore how the ancestry shared with people alive today changes as we move back in time.
The SHADING OF AREAS represents the similarity of your autosomal DNA to our regions. the darker areas represent more genetic similarity. As the slider moves further back in time, other areas get highlighted, showing that the further you go back in time, your genetic similarities to other areas and populations increase, until we reach a point back in time where "we are all made up of all of us".
The DOTS ON THE MAP illustrate human population density today, with approximately one dot per million people. There are more dots in the regions where the largest numbers of descendants of your ancestors, at different times in the past, now live.
It is very important to note that whilst you know where your relatives live today, we don’t know where your ancestors lived. For example, if you are European, you will share ancestry with India via ancient people that spoke an Indo-European language, but the locations of these groups are still a subject of academic debate (e.g. It is likely to include the steppe, but may also include Anatolia or other locations). As another example, Eurasians will have Native American relatives, shared from before the ancestors of Native Americans crossed the Bering Strait; in this case we know that these ancestors never actually visited the Americas, but the descendants of those ancestors did.
Finally, we note that this is a development feature that uses an unpublished model of ancestry shared via ancient populations. We will continue to improve and test this and future models, and therefore your results are potentially subject to significant change, as accuracy increases.