It was entertaining and peaked my interest in the unusual location of those bones. The theory that these were graves is plausible but I am a bit bothered by the brain size & intelligence. This cave was a mine at one time so the etchings on the wall need further study. Did the modern miners make these marks with their tools? Never discussed. I think a geologist would be of value in determining if these etches were made by modern tools or a natural occurrence. They theorized the motivation for the placement of bodies to a belief in the afterlife and a near spirituality. The same with the possible tool in a child’s hand to be used in the afterlife. Could it have been placed as a sign of grief. I think these conjectures especially at the end need further study