A story about the small talk of two brilliant mathematicians reminds me that a curious and well-informed mind can find much of interest in the world. The taxi-cab’s number 1729 turns out to be a very interesting number. Get in touch: @gretchenrubin; podcast@gretchenrubin.com Get in touch on Instagram: @GretchenRubin Get the podcast show notes by email every week here: http://gretchenrubin.com/#newsletter Order a copy of Gretchen’s new book OUTER ORDER, INNER CALM here: http://outerorderinnercalmbook.com Leave a voicemail message on: 774-277-9336 For information about advertisers and promo codes, go to happiercast.com/sponsors. Happier with Gretchen Rubin is part of ‘The Onward Project,’ a family of podcasts brought together by Gretchen Rubin—all about how to make your life better. Check out the other Onward Project podcasts—Do The Thing, Side Hustle School, Happier in Hollywood and Everything Happens with Kate Bowler. If you liked this episode, please subscribe, leave a review, and tell your friends! To learn more about listener data and our privacy practices visit: https://www.audacyinc.com/privacy-policy Learn more about your ad choices. Visit https://podcastchoices.com/adchoices