Jeremy asks – Why do trees have rings? Why are some rings bigger than other rings? – and looks at how experiments at the University’s Institute of Forest Research (BIFoR) are setting out to find answers as to how trees will respond to climate change.
Alice looks at two archaeological sites with exceptional preservation of wood. At Must Farm, relics include entire Bronze Age roundhouses, down to the handles of axes and wooden buckets. At Bettelbuhl in Germany, archaeologists have been able to determine the precise year in which an Iron Age princess was buried – thanks to tree rings.