Original Astrobiology: Does a galaxy filled with habitable planets mean humanity is doomed? – @io9 http://io9.com/5919110/does-a-galaxy-filled-with-habitable-planets-mean-humanity-is-doomed … io9 Does a galaxy filled with habitable planets mean humanity is doomed? Last week, we reported on the astounding confirmation that all solar systems in the Galaxy probably have planets, and that Earthlike planets are more common than previously … Continue reading Backfill: Twitter: Astrobiology: Does a galaxy filled with habitable planets mean humanity is doomed? – @io9 http://io9.com/5919110/does-a-galaxy-filled-with-habitable-planets-mean-humanity-is-doomed …