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Title: On the scale of the cosmic calendar, in which the history of the universe is com Post by: killian on Apr 29, 2014 On the scale of the cosmic calendar, in which the history of the universe is compressed to 1 year, how long has human civilization (i.e., since ancient Egypt) existed?
A) about half the year B) about a month C) a few hours D) a few seconds E) less than a millionth of a second Title: Re: On the scale of the cosmic calendar, in which the history of the universe is com Post by: padre on May 17, 2014 Content hidden
Title: Re: On the scale of the cosmic calendar, in which the history of the universe is com Post by: killian on May 17, 2014 Thanks for helping me with my astronomy class
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