Welcome to "Securities," a podcast and newsletter devoted to science, technology, finance, and the human condition. In this episode, Josh Wolfe and Danny Crichton bring science fiction into science fact with our guest, Christopher Mason, a geneticist and computational biologist who has been a principal investigator of 11 NASA missions and projects.

Mason, a professor of genomics, physiology and biophysics at Weill Cornell Medicine, discusses his book, "The Next 500 Years: Engineering Life to Reach New Worlds." The book explores the concept of protecting humanity from inevitable extinction by venturing to other planets. While most focus on the technologies to deliver us to these places, Mason takes a different angle, focusing on the biological adaptations necessary for humans to survive in space.

Mason discusses the need for both physical engineering and biological engineering in space travel. He highlights the importance of understanding and potentially engineering our microbiome for space travel, given its significant role in our health and digestion. He also discusses the potential of gene editing, using the example of the vitamin C gene, which we could potentially reactivate to allow humans to auto-synthesize vitamin C.

The conversation also covers the physical changes experienced by astronaut Scott Kelly during his time on the International Space Station and the implications of these changes for future space travel. Mason discusses the potential of engineering the perfect space specimen, considering factors such as gravity, radiation, and circadian rhythms.