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Author Question: People have long speculated about whether life exists on Mars. Scientists have e (Read 1716 times)

Mr. Wonderful

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on: Apr 23, 2014
People have long speculated about whether life exists on Mars. Scientists have evidence that on Mars, ______.
A) microbial life exists
B) liquid water has existed in the past
C) the only water present has always been frozen in the polar ice caps
D) water is found only in the form of water vapor


ghost!

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Reply #1 on: Apr 29, 2014
B


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Mr. Wonderful

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Reply #2 on: Apr 29, 2014
Wow, thanks!


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