"Before, we could hardly make out dunes there, " said Rich Zurek, project scientist for the Mars Climate Orbiter and Mars Polar Lander, set to arrive at the planet in September and December, respectively.

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The five-week cruise set off on July 4 and is now in the sub-polar region of the North Atlantic between Greenland and Iceland.

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Changes proposed in the latest DSM, set for publication in May of 2013, include the elimination of bi-polar I disorder and narcissistic personality disorder, and the addition of hoarding as an independent disorder.

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