Sir Martin Rees is a cosmologist, astrophysicist, and Astronomer Royal in Britain. His latest book "On the Future" is a brief description of where we are headed as humanity, and what risks and opportunities may arise along the way. He believes that the 21st century is crucial for our survival in the future, and in Heja Framtiden episode 71, he explains why. The conversation was recorded at Fri Tanke förlag in Stockholm. Podcast host: Christian von Essen / Read more at http://www.hejaframtiden.se