Carl Sagan
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Is there anything more beautiful than the cosmos?
Asked by Parrappa | 27 responses -
How often did Carl Sagan smoke marijuana?
Asked by Qingu | 19 responses -
Sand vs stars (& how is this quantifiable)?
Asked by everephebe | 10 responses -
What are different ways of measuring Earths current civilization?
Asked by SpideySense | 7 responses -
What do you make of this 4-minute video?
Asked by ETpro | 13 responses -
What defines a civilization?
Asked by talljasperman | 3 responses
