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Seven7Seven Seven7Seven
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6 years ago
The one term of the Drake equation whose value remains completely unknown is the average lifetime of a technological civilization.
 
  Indicate whether the statement is true or false

Question 2

Because it has a higher percentage of ________, Neptune appears even bluer than Uranus.
 
  Fill in the blank(s) with correct word

Question 3

Binary star systems are considered good candidates in SETI.
 
  Indicate whether the statement is true or false

Question 4

We have found Titan's surface to have perfect living conditions for Earthlike life.
 
  Indicate whether the statement is true or false
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aznrusheraznrusher
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6 years ago
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Seven7Seven Author
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#2
6 years ago
Electric Light Bulb All of these are right, thanks!
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