Orpbit writes: On the subject of markers, and connection to cosmology, you might be interested in this article:
Decoding Göbekli Tepe with Archaeoastronomy: What Does The Fox Say? - Martin B. Sweatman and Dimitrios Tsikritsis
We have interpreted much of the symbolism of Göbekli Tepe in terms of astronomical events. By matching low-relief carvings on some of the pillars at Göbekli Tepe to star asterisms we find compelling evidence that the famous ‘Vulture Stone’ is a date stamp for 10950 BC ± 250 yrs, which corresponds closely to the proposed Younger Dryas event, estimated at 10890 BC. We also find evidence that a key function of Göbekli Tepe was to observe meteor showers and record cometary encounters. Indeed, the people of Göbekli Tepe appear to have had a special interest in the Taurid meteor stream, the same meteor stream that is proposed as responsible for the Younger-Dryas event. Is Göbekli Tepe the ‘smoking gun’ for the Younger-Dryas cometary encounter, and hence for coherent catastrophism?
http://maajournal.com/Issues/2017/Vol17-1/Sweatman%20and%20Tsikritsis%2017%281%29.pdf
There is also an item in the Telegraph about it:
http://www.telegraph.co.uk/science/2017/04/21/ancient-stone-carvings-confirm-comet-struck-earth-10950bc-wiping/
Something is not right. This message is just to keep things from messing up down the road