Mars was once covered by oceans, study says
<noinclude> University of California, Berkeley scientists have published a report in Nature that says Mars was once covered by massive oceans. In the 1980's the Viking spacecraft sent back images to NASA that had shown thousands of kilometers of ancient shorelines, known as Arabia and Deuteronilus, on the north and south poles of Mars, but the Mars Global Surveyor got a closer look of the shorelines and photographed a 300 meter length of the two shorelines in the 1990's. Those images had shown that the alleged shorelines were too warped and
Source: Wikinews