RT @SpaceX: Inspections found a faulty check valve on engine #5. We are replacing tonight. Next attempt Tuesday, 5/22 at 3:44 AM ET. #DragonLaunch
Many differences also exist in the way the two megaliths were built. Nabta consists of several sites spread out over approximately one square mile. Namoratunga has three sites spread out over a greater area. Nabta sites are circular, but Namoratunga II is more linear. The rocks themselves are also different. The rocks at Nabta are much bigger than the rocks at Namoratunga II, which are only about one meter high, or less. Nabta's rocks are unshaped, but the rocks at Namoratunga II have been shaped to have four flat sides and a slanted top. The rocks at Namoratunga II also have petroglyphs on them and the rocks at Nabta do not. Many pieces of pottery that had symbols on them were found at Nabta, but no pottery was found at Namoratunga II.
It can be theorized that the same line of people who built Nabta could have migrated south over the thousands of years that passed between the construction of the two megaliths, and built Namoratunga II. Cultural changes over the large time span could account for the diferences between the two megaliths. Not enough evidence exists to come to a conclusion.
(H. Price)
Source: http://www.as.utexas.edu/~wheel/
