Asteroids may not be as stable as scientists thought. A recent experiment shows that the force from a landing spacecraft might easily cause an avalanche or something resembling an extraterrestrial mudslide, as a result of shifts in the dust on the asteroid's granular surface.
via The Verge - All Posts http://www.theverge.com/2013/7/5/4496320/landing-on-asteroids-could-cause-a-zero-gravity-avalanche
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