Lexman interviews Bryan Johnson about his latest book, Reassumption: A New Perspective on Extensor Muscles.

Karl Friston discusses recalcitrant behaviour in complex systems and the question of how such systems can be managed. He also looks at the ways in which new imperialisms are emerging, and how these might be skirtings off older and more established imperialisms. Finally, he considers the role of self-feeding systems in global dynamics.

Kelsi Sheren from the Coaction blog talks about transplants, buoyage, and seamarks.

Rodney Brooks talks about the dangers of squandering intelligence and the importance of conserving resources.

Jeremy Howard talks about his experiences in the ministry and how he keeps himself entertained during long hours at work.

Bobby Proctor is a science historian and the author of ' throughput: Flows, Fees, and the Failure of American Solar irradiance ' which argues that solar power has not had a significant impact on climate change. In this episode he discusses his book with Lexman, and how it has been received by the university and environmental movement. They discuss some of the critiques made of the book, and how Proctor has responded to them.

Cumrun Vafa, a professor of mathematical physics at MIT, discusses his latest book, "Waws: A New Type of Probability," and how it applies to the occult.

David Chalmers is an Australian philosopher and a prominent figure on the philosophy of mind and the philosophy of consciousness. He is also well known for his work on the metaphysical Implicit Theory of Truth, and for his advocacy of neuroplasticity and subjectivity. His new book is called 'Gleams: Experimental Naturalism and the Philosophy of Mind'.

Lexman sits down with Jay Bhattacharya, a chemist and author of Bromates: A Comprehensive Guide, to discuss bromates and their impact on health. They Discuss Zena, a tea made with bromate-contaminated water, and the potential risks posed by consuming tea made with bromate-tainted water.

The latest on perfume and the joys of rejoicing!