Wytham Woods is one of the most studied piece of woodland on Earth. From birds to badgers, grasses to trees; almost every aspect of this beautiful bastion of English countryside has gone under the microscope, contributing to decades of cutting-edge scientific research at the University of Oxford. Wytham is truly the laboratory with leaves.

Laboratory with Leaves (episode 5): The Fen

Fens aren’t just muddy mosquito-ridden wetlands — they are miraculous historical archives going back tens of thousands of years. Hidden in the layers of wobbly peat at Marley Fen are clues that are helping researchers understand the environment of Wytham Woods as far back as the last ice age.