“The height of the Chacoan culture lasted from A.D. 1055 to 1083, corresponding to the period of most intense building activity. This period also produced the most startling series of events in the heavens that have taken place within the… — J. McKim Malville Copy Share
“The height of the Chacoan culture lasted from A.D. 1055 to 1083, corresponding to the period of most intense building activity. This period also produced the most startling series of events in the heavens that have taken place within the Iast few thousand years. In July 1054 the supernova which produced the Crab Nebula blazed in the daytime skies for… — J. McKim Malville Copy Share