In this recent talk from the Royal Institution, Matt Parker, comedian and mathematician, shows how four-dimensional shapes appear a 3D world. Matt Parker was an Australian school teacher before he moved to London where he works as a stand-up comedian and a maths communicator. He writes books, appears on radio programmes and TV shows, contributes to newspapers, makes school visits and gives live comedy shows. In this talk Matt explains how to know when someone’s throwing a 4d cubes at you and also what happens when your mum knits a three dimensional shadow of a four dimensional donut – to wear on your head. For more videos visit the links below.