An expedition drilling into the sea-floor near the South Pole has discovered the root network of an ancient forest. It reveals surprisingly high temperatures in the Antarctic during the Cretaceous period, and the existence of a rich, temperate rainforest just 900km from the Pole. Read the research here: https://www.nature.com/articles/s41586-020-2148-5 Sign up for the Nature Briefing: An essential round-up of science news, opinion and analysis, free in your inbox every weekday: https://go.nature.com/371OcVF