I can't think of a better and more informative way of delivering information about life and the universe than a gentle older british professor.<br><br>I'm not familar with Martin Rees, but even 5 minutes in I'm totally enraptured,(reply>), He’s not just an older British professor. He’s the Astronomer Royal! The very top! Well done to get him on!  He seemed to be having a very good time and the resulting chat was uplifting and enlightening. Hard work for a non-scientist like me (I’m with his chimps on this!)but I am compelled to try. Very entertaining questions!