Eric Walker added Please Call Earth. We Still Haven’t Found You. - The New York Times to Drake Equation

Eric Walker added Looking for Another Earth? Here Are 300 Million, Maybe - The New York Times to a number of topics

Eric Walker added Looking for Another Earth? Here Are 300 Million, Maybe - The New York Times and Please Call Earth. We Still Haven’t Found You. - The New York Times to Drake Equation, and added Drake Equation to Astronomy, astrophysics and cosmology

Eric Walker added a number of topics and a number of links to Astronomy, astrophysics and cosmology, and added Astronomy, astrophysics and cosmology to Space travel, exploration and defense and Physics