What made the mass of this tiny asteroid fluctuate in defiance of all known physical laws? It was an impossible fact—but then, so was the girl who they knew couldn't exist! Red Brewer had plugged his electric razor into the lab circuit and he was running it over his pink jowls while I tried to discover what was haywire about the balance scales. "Have you noticed," Red said above the clatter of his shaver, "how much less you have to shave on an asteroid?" "I still shave every day," I said. There