Moon craters may hold ancient asteroid pieces[ Tue, 28 May 2013 15:32:26 GMT ]By Mike WallSpace.comTwenty-five percent of the moon's impact craters may retain substantial remnants of the asteroids that created them, a new study finds.The surprising result suggests that scientists will have to work a little harder than they had perhaps anticipated to figure out what the moon is made of, researchers said."Future studies of the moon's composition will have to show that exposed...