Mark Maslin FRGS is a Professor of Earth System Science at University College London. He is a founding Director of Rezatec Ltd and he was a Royal Society Industrial Fellow. He is science advisor to Transition Lab, Sopra-Steria, and Sheep Inc. He is member of Cheltenham Science Festival Advisory Committee. Maslin is a leading scientist with particular expertise in past global and regional climatic change and has publish over 160 papers in journals such as Science, Nature, Nature Climate Change, The Lancet and Geology. He has been awarded research council, charity and Government research and postgraduate training grants of over £60 million. His areas of scientific expertise include causes of past and future global climate change and its effects on the global carbon cycle, biodiversity, rainforests and human evolution. He also works on monitoring land carbon sinks using remote sensing and ecological models and international and national climate change policies.