One way to understand climate change is by climbing to extremes. In this episode of Unfold, co-host Kat Kerlin trekked up some of the highest peaks in the Sierra Nevada range with UC Davis forest ecologists with the goal of finding the highest altitude Jeffrey pine trees. Their presence can reveal a lot about our warming planet. We’ll hear about her trip – and how a little bird “gardener” can play a large role in reshaping California’s forests.In this episode:Hugh Safford, UC Davis forest ecologistSachi Srivastava, UC Davis graduate studentMike Mahoney, UC Davis doctoral studentNick Parker, UC Davis undergraduate  Read “An Extreme Tree Hunt in the Sierra Nevada Mountains” to learn more about the research.