Johnny Ball is a populiser of mathematics, and has been presenting maths in entertaining ways for over 40 years. Today Johnny is going to talk about how ancient mathematicians measured the Earth

Johnny's book, Wonders Beyond Numbers. A brief history of all things mathematical: https://www.amazon.co.uk/WondersBeyo...

Johnny's website: https://johnnyball.co.uk/
Johnny's tour: https://johnnyball.co.uk/index.php/wo...

MathsWorldUK: https://mathsworlduk.com/