A New Rock from Mars

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Science  09 Nov 2012:
Vol. 338, Issue 6108, pp. 720
DOI: 10.1126/science.338.6108.720-c
CREDIT: NHM-LONDON, C. SMITH

On 18 July 2011 a meteorite originating from Mars fell on the moroccan desert. Chennaoui Aoudjehane et al. (p. 785, published online 11 October) show that this meteorite was ejected from the surface of Mars 700,000 years ago and contains components derived from the interior, surface, and atmosphere of the red planet. Previous to this fall, only four other martian meteorites have been collected after being witnessed falling to Earth. All the other martian meteorites that are represented in collections around the world, have been found long after their arrival on Earth, and thus have suffered from exposure to the terrestrial environment.

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