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serg [7]
4 years ago
12

Why do astronomers think that there may be other advanced civilizations?

Advanced Placement (AP)
2 answers:
stira [4]4 years ago
5 0
So much of space is unexplored and there are possible signs of previous life on planets such as Mars
Phantasy [73]4 years ago
4 0
Because space is so huge that it would be silly to think that were the only ones

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