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doit_the_clown doit_the_clown
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7 years ago
The first successful detection of signals from extraterrestrial civilizations was accomplished in which year?
A)   1985
B)   Never—no such signals have been detected yet.
C)   1999
D)   1960
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
Authors:
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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein
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discovererdiscoverer
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7 years ago
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doit_the_clown Author
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7 years ago
this is exactly what I needed
Transonic
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Yesterday
This helped my grade so much Perfect
TheMoffattMan
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2 hours ago
Correct Slight Smile TY
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