Marc Defant gave a TEDx talk on the improbable events that had to happen in our planet's history for us to eventually evolve, along with the implications for other intelligent life in the galaxy. http://www.youtube.com/watch?v=_nCOhrYV7eg I find a lot to agree with in Defant's remarks, although there are a couple points I'd quibble with.  The … Continue reading The extraordinary low probability of intelligent life →