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.

Masterchef Sam sets off the smoke alarm.

It's a little-known fact that Fibonacci was a keen marathon runner.

Okay, he wasn't but he could be an invaluable help if you are a keen marathon runner.

Josh Bull is very keen.

Amazing what you can do with some wood, some glue and some mathematics.

André Henriques introduces his self-made contact structure.

Some people know all along, others are less sure, even mathematicians.

Here's alternative Jason.

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