Mattias Green is a physical oceanographer working on changes in tides and tidally driven processes on a range of scales. After earning degrees in oceanography at Goteborg University in Sweden, he moved to Bangor University in 2005. After a stint as a postdoc there, he received a NERC Advanced Fellowship, and later became senior lecturer in physical oceanography at Bangor. He is now professor of physical oceanography at Bangor and works on tides and tidally driven processes and how they change on a range of time scales – from years to eons. He has published 70 peer reviewed papers to date and his work has been highlighted by Nature, Science, The Conversation, CNN, and a number of other international outlets.