Sagan said there were probably 10,000 inhabited planets in each galaxy. It is inconceivable that he was correct. On objective grounds, we could well be, we seem to be, the only intelligent life in the universe.
Posts Tagged ‘John O’Keefe’
Sagan to Brownlee 11
Posted in cosmology, History of Science, tagged Big Bang, Jastrow, John O'Keefe, Penzias & Wilson, Rare earth, Sagan, Ward & Brownlee on August 18, 2010 | Leave a Comment »
Rare Earth ~ Privileged Planet
Posted in cosmology, tagged Brownlee, John O'Keefe, Privileged Planet, Rare earth, Robert Jastrow on June 22, 2010 | 1 Comment »
Not only is the universe unique, but the earth on which we live and discover the universe is also unique — or so it seems.
Geology: 20th century
Posted in geology, History of Science, tagged Abraham Ortelius, John O'Keefe, plate tectonics, satellites on March 17, 2010 | Leave a Comment »
Geology of the 20th century was dominated by two fundamental shifts in paradigm, plate tectonics, and the new view of Earth from satellites.
Notice the universe!
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