Megaliths of Jewish Lost Tribes

There are two unresolved mysteries in history. One is the disappearance of the ten Israelite tribes that the Assyrians had enslaved and transported to their lands and put them to slave for the empire. They eventually disappeared from history, and the Bible refers to them as the ‘Lost People’.
The second unresolved mystery revolves around the Megalithic dolmens and other burial sites discovered in different parts of Africa, Europe, Asia and the Indian sub continent. There are no clues to the original owners of these monuments which were obviously burial sites. Remains of bones, implements and utensils used by these people have been found from some of the sites. These magnificent relics of an unknown people from remote past have not been claimed by any surviving people as belonging to their ancestors.
Could they be the remains of the "Lost Tribes?" Are there sufficient leads to trace the authors of these unique monuments? What follows is an effort at solving these mysteries for good. And possibly discover their survivors, too!