[meteorite-list] Asteroid Jiggles Like a Jar of Mixed Nuts

[Mal Bishop]

"Like a jiggled jar of mixed nuts, shaking on the near-Earth asteroid 
Itokawa is sorting loose rock particles
on its surface by size, causing the smallest grains to sink into 
depressions, a new study suggests. ..."

http://www.space.com/scienceastronomy/070419_shaking_asteroid.html