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jksdsf2322
Posted: Tue 21:31, 09 Jul 2013
Post subject: Signs of stream discovered on Mars
Signs of stream discovered on Mars
organizations previous signs that water existed on the red planet long ago, But the photos showing pebbles rounded off, almost certainly by water, Offered the most persuasive evidence so far of an ancient streambed.
there was clearly "A vigorous flow at first glance of
the discovery did not come as a complete surprise,
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. Nasa decided to put Curiosity down inside Gale Crater near the Martian equator because photos from space hinted that the spot possessed a watery past.
The sixwheeled rover landed safely on August 5 after a nailbiting plunge along with the Martian atmosphere. truly on a twoyear, 2.5 billiondollar mission to study whether the Martian environment has been favourable for microbial life.
Presentday Mars is a frozen desert no hint of water on its radiationscarred surface, But geological studies of rocks by previous missions suggest our planet was once warmer and wetter.
The latest evidence came from photos that Curiosity took revealing rounded pebbles and gravel a sign that the rocks were sent long distances by water and smoothed out. The size of the rocks ranging from a sand grain to a golf ball indicates that they could not have been carried by wind, Said mission researcher
Rebecca Williams of the Planetary Science commence in
Though Curiosity did not use its hightech devices to drill into the rocks or analyse their chemical makeup,
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, Mr Grotzinger said scientists were sure that water played a role based on just studying years into the future.
It is unclear how long the water persisted at first glance, But it easily might well have lasted "Thousands to immeasurable years,
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, Said mission researcher Bill Dietrich of the
collage of California,
louis vuitton bags
, Berkeley.
appeal to chanced upon the driedup streambed while driving to Glenelg, An serious spot where three types of terrain meet. Its ultimate fascination is Mount Sharp,
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, A hilly rising from the centre of crater floor, But it was not expected to travel there until the end of the year.
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