Introduction

Astrobiologist David grinspoon was last heard here when he joined allan stern to talk about their book, chasing horizons. The best selling chronicle of the new horizons mission to pluto and beyond. He has written other popular books over the ears as he has continued his research at the planetary science institute. Now he has been named a lifetime fellow of the triple a s, the american association for the advancement of science. A conversation that will run the gamet from the possibility of past life on venus to what it was like growing up with karl segan and isaac asamov as regular house guests.