Wandering Poles May Explain Ups And Downs Of Ancient Mars Shoreline
by Staff Writers
Berkeley CA (SPX) Jun 13, 2007
A paper in this week's issue of Nature by University of California, Berkeley, geophysicists demolishes one of the key arguments against the past presence of large oceans on Mars. Even from Earth, a large plain surrounding the planet's north pole looks like a sediment-filled ocean basin. In the 1980s, Viking spacecraft images revealed two possible ancient shorelines near the pole, each thousands of kilometers long with features like those found in Earth's coastal regions
http://www.marsdaily.com/reports/Wandering_Poles_Could_Explain_Ups_And_Downs_Of_Ancient_Martian_Shoreline_999.html