Carl Sagan
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How often did Carl Sagan smoke marijuana?
Asked by Qingu | 20 responses -
Is there anything more beautiful than the cosmos?
Asked by Parrappa | 27 responses -
Sand vs stars (& how is this quantifiable)?
Asked by everephebe | 10 responses -
Do you remember the original Cosmos series from 1980? Did you know there will be a vintage marathon this weekend?
Asked by Buttonstc from iPhone | 10 responses -
Do Neil deGrasse Tyson and Stephen Hawking and others differ about the black hole?
Asked by flo | 7 responses -
When will we advance our Kardashev scale?
Asked by talljasperman | 12 responses -
Does Ukrainian, unmanned "Vampire drones" violate Carl Sagan's/Issac Asimovs ,Three laws of robotics?
Asked by RedDeerGuy1 | 9 responses -
What are different ways of measuring Earths current civilization?
Asked by SpideySense | 8 responses -
How much did our Kardashev score go up this year (2013)?
Asked by talljasperman | 6 responses -
What do you make of this 4-minute video?
Asked by ETpro | 13 responses -
What defines a civilization?
Asked by talljasperman | 3 responses -
How much did our Kardashev score go up this year (2016)?
Asked by RedDeerGuy1 | 5 responses