Geoffrey West, former theoretical physicist now at the Santa Fe Institute, found many scaling laws in biology, cities, businesses, and more. One was that people

Geoffrey West, former theoretical physicist now at the Santa Fe Institute, found many scaling laws in biology, cities, businesses, and more. One was that people's walking speed scales with city size. Fascinating results. Here's a short article about his book, Scale: https://blogs.sciencemag.org/books/2017/07/11/a-physicist-probes-an-elegant-law-that-governs-cells-cities-and-almost-everything-in-between https://blogs.sciencemag.org/books/2017/07/11/a-physicist-pr.... He's spoken with TED too: https://www.ted.com/talks/geoffrey_west_the_surprising_math_of_cities_and_corporations https://www.ted.com/talks/geoffrey_west_the_surprising_math_.... Here are my podcast episodes with him, where he describes his findings: http://joshuaspodek.com/guests/geoffrey-west http://joshuaspodek.com/guests/geoffrey-west. (I'm a former physicist too who walks fast at 48.)