Newsweek quotes Patrick Ryan Williams, UIC adjunct professor of anthropology, on climate change

Newsweek quotes Patrick Ryan Williams, UIC adjunct professor of anthropology, in an article about a study that suggests climate change was a major factor in the decline of ancient South American populations. Williams, who is associate curator and head of anthropology at the Field Museum, says that climate change and human demography studies can reveal important information, but the study in question has some flaws.   http://bit.ly/2VslL0Q