Ancient Chinese city of Bicun; longevity of Mesoamerican cities; Iberia as Ice-Age refugium; evidence of prehistoric TB in Ecuador


Chinese city had planned layout, extensive defenses

Mesoamerican study shows good governance was key to longer-lasting cities  Alternate Link

DNA study suggests early Europeans waited out the Ice Age in Iberia Alternate Link

Genetic analysis discovers TB resistance in pre-contact Americans Alternate Link