Lies and politics have always come as a pair, but the untruths keep getting bigger and more frequent; our correspondent digs into why. We speak with an adventurer who fought off the murderous boredom of a whole Antarctic winter with little more than books. And, the benefits and risks of home genetic-testing kits. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/radiooffer For information regarding your data privacy, visit acast.com/privacy