Get up to 91% off yearly web hosting plans. Go to https://www.hostinger.com/stevemould and use promo code stevemould at checkout. https://ninterestingthings.com/ In this episode: 1. Why is the end of a tape measure always wobbly 2. Why hammerhead sharks have hammer shaped heads 3. Why I can't give my wife a kidney 4. Why the north pole is a south pole 5. The ant with a door for a head You can buy my books here: https://stevemould.com/books You can support me on Patreon here: https://www.patreon.com/stevemould just like these amazing people: Glenn Watson Nathan Williams Joël van der Loo Matthew Cocke Mark Brouwer Twitter: http://twitter.com/moulds Instagram: https://www.instagram.com/stevemouldscience/ Facebook: https://www.facebook.com/stevemouldscience/ Buy nerdy maths things: http://mathsgear.co.uk/