Planetary Impacts by Clustered Quark Matter Strangelets
  We propose a model of clustered u-d-s quark matter that leads to stable bulk strange quark matter. We discuss qualitatively consequences of impacts by sub-planetary mass strangelets on rocky solar system bodies. 
Lance Labun and Jan Rafelski
hep-ph astro-ph.EP astro-ph.HE nucl-th