Calling all pessimists! Your brain is wired for optimism! Yes, deep down, we’re all Pollyannas. So wipe that scowl off your face and discover the evolutionary advantage of thinking positive. Also, enjoy other smile-inducing research suggesting that if you crave happiness, you should do the opposite of what your brain tells you to do. Plus, why a “well-being index” may replace Dow Jones as a metric for success … a Twitter study that predicts your next good mood … and whether our furry and finned animal friends can experience joy. Guests: •              Frank Drake – Trustee at the SETI Institute and author of the Drake Equation •              Tali Sharot – Cognitive neuroscientist at the Wellcome Trust Centre for Neuroimaging at the University College London and the author of The Optimism Bias: A Tour of the Irrationally Positive Brain •              Michael Macy – Sociologist at Cornell University His team’s Twitter study: http://timeu.se/ •              Carol Graham – Economist at the Brookings Institution and author of The Pursuit of Happiness: An Economy of Well-Being •              David DiSalvo – Science and technology writer, author of What Makes Your Brain Happy and Why You Should Do the Opposite •              Robin Ince – U.K.-based comedian •              Jonathan Balcome – Animal behavior scientist and author of The Exultant Ark: A Pictorial Tour of Animal Pleasure Learn more about your ad choices. Visit megaphone.fm/adchoices