On this week’s Tech Nation, how we came to question climate change. To even question the science. What’s it all about? Nathaniel Rich, journalist and author of “Losing Earth: A Recent History”, explains. Then Tech Nation Chief Correspondent Daniel Kraft talks about the age of the medical selfie.

On this week’s Tech Nation, Peter Calthorpe, co-founder of Urban Footprint, who focuses on sustainable urban growth and planning, and the author of “Urbanism in the Age of Climate Change”.

On this week’s Tech Nation, journalist Sonia Purnell talks about the spycraft of Virginia Hall, an American in Occupied France during World War II. Her book is called “A Woman of No Importance.” Then Dr. John Haurum (ha-RUMM) from F-Star in Cambridge, England describes their approach to creating cancer drugs, and Tech Nation Health Chief Correspondent Dr. Daniel Kraft talks about sleep – and upsides and downsides of all this technology.

On this week’s Tech Nation, Dr. Alex Dehgan joins Moira to talk about “The Snow Leopard Project … and other Adventures in Warzone Conservation”. And we’ll from Tech Nation regular contributor, Gary Davis, the Chief Consumer Security Evangelist at McAfee – phishing is more than just an innocent-looking email in your inbox.

On this week’s Tech Nation, Fast Company columnist Jonah Sachs. His book is “Unsafe Thinking: How to Be Nimble and Bold When You Need It Most”. Then on Tech Nation Health, Dr. Tom Lowery from T2 Biosystems – their part in fighting life-threatening Sepsis. And David Domzalski from Foamix Pharmaceuticals talks about a new approach to America’s most common skin disorder: Acne.

On this week’s Tech Nation, Ann Mei Chang, the Executive Director of Lean Impact, before a live audience at the Women in Leadership and Philanthropy Symposium at the University of San Francisco. Her book is “Lean Impact … How to Innovate for Radically Greater Social Good”. And Jerry Sheehan, the Deputy Director of the National Library of Medicine at NIH - the world’s largest medical library, founded in 1836 as a bookshelf in the office of the Army Surgeon General.

On this week’s Tech Nation, Science/Tech entrepreneur Safi Bahcall. He’s written “Loonshots … How to Nurture the Crazy Ideas that win wars, cure diseases, and transform industries.” And French biotech - Sensorion Pharmaceuticals. Its president and CEO, Nawal Ouzren, tells us about making progress in severe vertigo, sudden hearing loss, and hearing loss in children following treatment for cancer. Also, Daniel de Boer, the CEO of ProQR Therapeutics, talks about their approach to treat genetic diseases, including as childhood blindness. We’ll learn how it works, and why it’s safe.

On this week’s Tech Nation, cognitive scientist Maryanne Wolf and her book: “Reader, Come Home: The Reading Brain in a Digital World”.

Then on Tech Nation Health, neuroscientist Dr. Mark Gurney, CEO of Tetra Discovery Partners, talks treatments for such challenges as Fragile X Syndrome, Alzheimer’s disease, and traumatic brain injury.

On this week’s Tech Nation, Mikko Hyppönen, the Chief Research Officer at F-Secure. Cybersecurity in the world today, as well as Hypponen’s Law. Then, the new approach taken with first Post-Partum depression drug. Dr. Jeff Jonas, the CEO of Sage Therapeutics, tells us how it just may work for depression in general. And finally, why do these drugs cost so much? Mike Abrams from Numerof and Associates explains.

On this week’s Tech Nation, historian and MIT professor Kate Brown talks about “Manual for Survival … A Chernobyl Guide to the Future”. She looks at the long term impact of Chernobyl – on humans, on the environment, on the politics of governments with nuclear capabilities, and even on international humanitarian organizations.