origins and meaning of these monuments, which required a heavy investment in labour, have been debated for more than a century, as has the social organisation of the farming communities that built them. The genetic analysis of two-dozen individuals found in various megalithic tombs from Scandinavia to Orkney Island and

อ่านต่อเพิ่มเติม โรงเรียนบ้านรางม่วง

สาระสำคัญ   ไฟฟ้า