Forests across the world could be heading towards a future of thinner canopies, widespread tree loss and browning landscapes, according to a new study that has reconstructed ancient forests from 56 million years ago. The research, published in Science, examines the Paleocene-Eocene Thermal Maximum (PETM), a period when a massive release of carbon dioxide caused … Continue reading 56m years ago, forests collapsed in the heat. Could it happen again?