Talithia Williams thinks you should rigorously track your body's data. She and Steve Levitt trade birth stories and bemoan the state of STEM education.

Kevin Kelly believes A.I. will create more problems for humanity — and help us solve them. He talks to Steve about embracing complexity, staying enthusiastic, and taking the 10,000-year view. 

Clementine Jacoby went from performing in a circus to founding a nonprofit that works to shrink the prison population. 

Steve is on a mission to reform math education, and Sarah Hart is ready to join the cause. In her return visit to the show, Sarah explains how patterns are everywhere, constraints make us more creative, and literature is surprisingly mathematical.

From recording some of the first rap hits to revitalizing Johnny Cash's career, the legendary producer has had an extraordinary creative life. In this episode he talks about his new book and his art-making process — and helps Steve get in touch with his own artistic side. 

Physician Peter Attia returns to the show to talk about the science of longevity — which focuses not only on extending life but on maintaining good health into old age. He explains the possibilities and limits of current medicine and gives Steve his best advice on how to defeat the aging process.

Steve and producer Morgan Levey look back at the first 100 episodes of the podcast, including surprising answers, spectacular explanations, and listeners who heard the show and changed their lives.

Tom Dart is transforming Cook County’s jail, reforming evictions, and, with Steve Levitt, trying a new approach to electronic monitoring.

Since his last visit to People I (Mostly) Admire, the formerly top-ranked golfer has become the sport's most controversial figure. Why has he partnered with the Saudi government — and can his new golf league unseat a monopoly? 

Neil Shubin hunts for fossils in the Arctic and experiments with D.N.A. in the lab, hoping to find out how fish evolved to walk on land. He explains why unlocking these answers could help humans today.