Multiple Choice
If the communication lifetime of civilizations in our galaxy is 100 million years and our galaxy is 13 billion years old, what is the chance of us detecting another intelligent civilization now?
A) 1 in 1,300,000
B) 1 in 13
C) 1 in 1300
D) 1 in 130
Correct Answer:
Verified
Correct Answer:
Verified
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