Economist Tim Harford on the importance of numbers and statistics. Tim Harford's website has links to most of his projects Tim's book How to Make the World Add Up - signed copies on Maths Gear Tim Harford books on Amazon Tim's video on Numberphile Support Numberphile on Patreon With thanks to MSRI

Sir Roger Penrose is one of the biggest names in mathematics AND physics. Here he talks about sibling rivalry, Stephen Hawking, having ideas, and toilet paper. Roger Penrose Wikipedia Roger Penrose books - Amazon The Order of Merit The Theory of Everything - 2014 movie about Stephen Hawking Penrose Tiling Penrose Toilet Paper The San Francisco Transit Center with its Penrose Tiling With thanks to MSRI Support us on Patreon

Dr Katie Steckles is a mainstay of the mathematics communications scene and a regular in our videos. Here she discusses her life at school, university, and now as a freelance maths communicator. Plus life as a pirate. Katie Steckles website Follow Katie on Twitter Talking Maths in Public Check out Katie's videos on Numberphile Support this podcast - and our videos - via Patreon With thanks to MSRI Apologies for the change in audio quality part way through - we had technical issues! Podcast Transcripts

Tributes to mathematician Ronald Graham - a man of many talents. Our guests include Steve Butler, Tom Leighton, and Joe Buhler Ron Graham 'fan' webpage Ron Graham papers Ron Graham on Numberphile A collection of Numberphile videos about Graham's Number Tom Leighton written tribute to Ron Steve Butler tribute to Ron

Speaking with Simon Pampena, Australia's National Numeracy Ambassador who once dreamed of being a Jedi. Simon Pampena website Videos with Simon on Numberphile Epic Circles and The Legend of Question Six Simon on Twitter Beyond 2000 The Malls' Balls are also discussed in our Quiz Episode with Matt Parker With thanks to MSRI Support us on Patreon - we appreciate your help The Patron Wall of Fame You can also catch this episode on the Numberphile2 YouTube channel

Our guest is Ben Sparks - teacher, math populariser, and Numberphile regular. Ben Sparks website Videos with Ben on Numberphile Video of Tim Sparks performing Your Own Idea - Nikko Fir and here's Tim's website A pic of Ben and Tim The Bill Clinton picture Ben's Mandelbrot Video on Numberphile Advanced Mathematics Support Programme Talking Maths in Public With thanks to MSRI Support us on Patreon - we appreciate your help The Patron Wall of Fame

Matt Parker takes a quiz prepared by Brady. The YouTube version of this quiz contains a few visuals. Do you like quizzes and puzzles and interactive courses? Then definitely check out episode sponsor Brilliant - and go to brilliant.org/numberphile for 20% off a premium subscription Many of the links below contain QUIZ SPOILERS. Matt Parker is standupmaths - his website has links to most stuff Matt's books on Amazon Matt's first appearance on this podcast Matt's videos on Numberphile Terry Tao on Numberphile Good Will Hunting which is directed by Gus Van Sant Two Numberphile videos about Good Will Hunting are here and here - featuring James Grime Newton, Euler, Gauss, Ramanujan, and Turing Newton videos from Brady's Objectivity channel Millennium Problems Festival of The Spoken Nerd, featuring Matt with Steve Mould and Helen Arney Steve and Matt's YouTube channels The Parker Square The video which created the Parker Square legend Parker Square T-Shirt Bonnie Parker Matthew Parker Ernest Parker Latin/Euler Squares on Numberphile Parker Solar Probe Lucie Green's PhD thesis Edna Parker Professor's Cube Superbowl 50 Luc Longley West Coast Eagles win the 1992 AFL Grand Final The Malls Balls Australia's Highest Point And the lowest Akshay Venkatesh With thanks to MSRI

Grant Sanderson from 3blue1brown returns to the podcast to talk about live-streaming lessons, tracing coronavirus, and a technical mishap. Support this podcast and Numberphile on Patreon Grant's channel - 3blue1brown Grant's first live lesson Exponential Growth - 3 blue1brown Simulating an epidemic - 3blue1brown The Coronavirus Curve with Ben Sparks - Numberphile Itempool Matt Parker Ben Eater Nicky Case Tweet The Accidental Stream Grant's eye video on Objectivity Objectivity channel

We pay tribute to John Horton Conway - with clips from the man himself, plus contributions from Siobhan Roberts, David Eisenbud, Colm Mulcahy and Tony Padilla. Genius at Play by Siobhan Roberts John Conway Numberphile Playlist Does John Conway hate his Game of Life? Inventing Game of Life Life, Death and the Monster Look-and-Say Numbers Monster Group Siobhan Roberts David Eisenbud Colm Mulcahy Tony Padilla

Dr Hannah Fry made a film two years ago which predicted the coronavirus pandemic with chilling accuracy. Dr Hannah Fry's website - links to all her stuff The BBC Contagion special on iPlayer If it doesn't work on iPlayer, this is a version I found on YouTube!? Numberphile video about the SIR curve with Ben Sparks Numberphile discusses coronavirus mathematics with Kit Yates False Positives on Numberphile with Lisa Goldberg PAPER: Contacts in context: large-scale setting-specific social mixing matrices from the BBC Pandemic project PAPER: Contagion! The BBC Four Pandemic – The model behind the documentary BBC Horizon Coronavirus Special - the more recent film Hannah made with the Beeb RI Christmas Lectures 2019: Secrets and lies Mathematician/epidemiologist Adam Kucharski on Twitter With thanks to MSRI Support us on Patreon