Government got problems. Climate got problems. Energy policy got problems. We all got problems. So we need a wide range of people to hang out together to tackle them.

Quick, quicker, less quick. Amandine Aftalion describes the trajectory of a 100m runner in this clip from her Oxford Mathematics Public Lecture.

When you next go swimming, take some maths with you. And don't worry, maths is waterproof. Nathan Creighton is in at the deep end.

Subscribe to Teaching and Learning