# Handshakes; Marchetti’s Constant of Commuting | Robert Sapolsky Father-Offspring Interviews

An episode of [Robert Sapolsky | Father-Offspring Interviews](https://invisiblenetwork.ai/podcast/1782280922), 18 Jun 2026, 32 min.

Audio: https://traffic.megaphone.fm/APO6678187342.mp3

Episode 116 of Father-Offspring Interviews. This episode includes discussion of Marchetti’s constant of human commuting, as well as why we humans shake hands and how other species do the same. Social & Websites Question Submission: https://ha66meqrpqz.typeform.com/sapolsky Instagram: https://www.instagram.com/robert.sapolsky Spotify: https://spoti.fi/3OuG4UD Apple Podcasts: https://apple.co/4ibqCdF 00:00 Intro 00:00:14 Question 1 (Marchetti’s Constant and Commuting) 00:15:06 Question 2 (Handshakes)

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