Scientists think big impact caused two-faced Mars (AP)

[riky]

Scientists think big impact caused two-faced Mars
    (AP)

 

<p>You are not allowed to view links. Register or LoginAP - Why is Mars two-faced? Scientists say fresh evidence supports the theory that a monster impact punched the red planet, leaving behind perhaps the largest gash on any heavenly body in the solar system.</p><br clear="all"/>


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