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Home Q & A Board Science-Related Homework Help Physics
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Tsync Tsync
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8 years ago
Assuming the conditions ripe for life and intelligence abound in the Galaxy, what factor limits the number of galactic civilizations?
A) the average survival time of the civilizations
B) the expansion of the Universe
C) the speed of technological development
D) the lack of metals for technology
E) the number of supernova explosions
Textbook 
Astronomy Today

Astronomy Today


Edition: 8th
Authors:
Read 356 times
3 Replies
Minoring in physics
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RatatouilleRatatouille
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8 years ago
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Tsync Author
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#2
8 years ago
Exactly what I needed Smiling Face with Open Mouth
Minoring in physics
wrote...
#3
8 years ago
Cool Smiling Face with Open Mouth
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