4.4.5 David Schwartzman: geobiologist

David Schwartzman (geobiologist). The root of the tree of life is hyperthermophilic. David's position is that we are not alone and his solution to the Fermi paradox is: the credentials committee of the galactic club is making their evaluation based on observations of the pathetic state of our primitive civilization...and we're not yet worthy of being members.