Thrilled to end the year with our new #OA paper in @SciReports! We used plant remains from ancient segments of the Great Wall to look at environmental and climate changes in northwestern China since the Han Dynasty. 1/7

nature.com/articles/s4159… You're probably familiar with the brick and stone masonry of the Ming Dynasty Great Wall, but did you know that the earliest Great Wall was constructed using locally available materials, with reed fascines and wood bundles interbedded with gravel-mixed rammed earth? 2/7