South American Observatories

Two different astronomical observatories pushing the art of astronomy in South America back a few thousand years have been reported over the past couple of days, one in the Peruvian Andes and one in the Amapa region of Brazil. I hate when that happens:

San Francisco Chronicle | Americas' earliest observatory unearthed - Structure in Andes dates to 2200 B.C.
BBC News | 'Brazilian Stonehenge' discovered