Warning: this is an adults-only show. David Baker, the Australian based author of The Shortest History of Sex, takes us through two billion years of sexual evolution. And, from the first microbial exchanges of DNA to Darwin and Freud, Tinder and sexbots, it’s not a pretty story. The good news, however, is that neither Baker nor I took off our clothes or confessed to any unusual fetishes. But we did talk about the sexual significance of Baker’s mustache which, I suspect, represents a kind of climax to two billion years of procreation and recreation.

David Baker is a history and science writer who holds the world’s first PhD in Big History (the field that explores patterns in deep time and across the natural and social sciences). He is an award-winning lecturer, has written educational videos seen by millions of people, and is the author of The Shortest History of Our Universe. He lives in Tropical North Queensland, Australia.

Named as one of the "100 most connected men" by GQ magazine, Andrew Keen is amongst the world's best known broadcasters and commentators. In addition to presenting KEEN ON, he is the host of the long-running How To Fix Democracy show. He is also the author of four prescient books about digital technology: CULT OF THE AMATEUR, DIGITAL VERTIGO, THE INTERNET IS NOT THE ANSWER and HOW TO FIX THE FUTURE. Andrew lives in San Francisco, is married to Cassandra Knight, Google's VP of Litigation & Discovery, and has two grown children.

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