Archaeologists have suggested that human populations in the region became too large to be supported by wild resources.
Other archaeologists suggest the cultural developments are indigenous, and the outside influences result from trade.
Although some archaeologists have suggested that it also had a wooden roof, this theory is disputed by others.
When the archaeologists suggested in a 2005 report that a battle had been fought there, they encountered some skepticism from other researchers.
In seeking to identify the pharaoh-queen, modern archaeologists have suggested three candidates.
Instead, archaeologists suggest that, in the end, Custer's troops were not surrounded but rather overwhelmed by a single charge.
From the presence of lead in silver artefacts, archaeologists suggest that cupellation may have occurred there.
Archaeologists suggested that the road's main purpose was to transport local and exotic goods inside and outside the canyon.
One archaeologist has suggested that it could be part of a defensive network extending outwards from Beedenbostel.
Some archaeologists suggest a group from Syria.