On this week’s Tech Nation, ANDREW MARANTZ talks about what social media is doing to the information we consume … and perhaps more importantly, the information we believe. His book is Antisocial – Online Extremists, Techno-Utopians, and the Hijacking of the American Conversation. Then, in biotech, DR. PAUL-PETER TAK, the CEO of Kintai Therapeutics gives us a bigger picture of our gut - it’s not just your microbiome that plays a significant role in the recovery from illness