This week I’m teaching my students about the different methods archaeologists use to figure out how old an artifact and/or site could be, like radiocarbon dating to thermoluminescence. One of my favorite kinds of methods is dendrochronology, also known as ‘tree-ring dating.’ Trees typically produce a distinct thin or thick growth ring per year, depending on the weather. A wet year will produce a thick ring, while a dry year will produce a thin ring. Why is that important? Well, those rings can help date an archaeological site (something specific, like 735 AD!)! On top of that, tree rings can help us understand past and present environmental processes and conditions (UA Laboratory of Tree-Ring Research), like climate change. [Read more]