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Water was once widespread on Mars, data from a Nasa spacecraft shows, raising the prospect that the Red Planet could have supported life. ... Rocks of this age have largely been destroyed on Earth by plate tectonics. They are preserved on the Moon, but were never exposed to liquid water. So rocks containing phyllosilicates on Mars preserve a unique record of watery environments in the early Solar System, some of which could have been...

2008-07-17

 water Mars geology tectonics astronomy extraterrestrial life solar system life prehistory
America and Eurasia will crash into each other over the North Pole in 50-200 million years time, according to scientists at Yale University.

2012-02-08

 America Eurasia North Pole continent tectonics future globe movement Pangaea