"deep within the samples" not samples taken from deep in the lunar surface--is .5m really deep though they were concerned the surface of the samples would be

"deep within the samples" not samples taken from deep in the lunar surface--is .5m really deep though they were concerned the surface of the samples would be contaminated by earth's atmosphere. regardless of where the samples were taken in regards to the moon's surface, they'd still need to be worked here on earth's surface. so they are taking their samples from within each bead from the "depths" of the 1mm bead and not just scratching something off the bead's surface. Edit: I finally read "extracted beads from deep with in samples" correctly. ::face-palm::