As I'm increasingly aware, Radio 4 is full of treats.
This week's gift is a daily 15 minute programme, The History of Mathematics, presented by Prof Marcus du Sautoy. Daily at 3.45pm, he looks at the life of one or more mathematicians who have shaped scientific thinking.
Today it was the turn of Newton and Leibniz. Like chicken and egg, which invented calculus first? Tomorrow it's the turn of Euler - after whom my first work PC was named!
(Given there are 10 episodes, that's really this fortnight's gift ...)