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rbayla rbayla
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5 months ago

Using a cosmic calendar where the big bang happened at midnight January 1, at what time did human civilization emerge?



1 hour before midnight on December 31



30 minutes before midnight on December 31



30 seconds before midnight on December 31



11 seconds before midnight on December 31

Textbook 
ASTRO

ASTRO


Edition: 3rd
Authors:
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cskeen80cskeen80
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5 months ago
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rbayla Author
wrote...

5 months ago
Good timing, thanks!
wrote...

Yesterday
You make an excellent tutor!
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2 hours ago
Just got PERFECT on my quiz
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