Maybe life really is one in a hundred billion. If so, that might be good news for Earth.
The source: “Where Are They?” by Nick Bostrom, in Technology Review, May–June 2008.
Philosopher Nick Bostrom has surprising aspirations for the Phoenix spacecraft, which landed in the arctic zone of Mars on May 25. The director of the Future of Humanity Institute at Oxford University wants the probe to turn up nothing—sterility, dead rocks, lifeless sands.