[Transcriber's Note: This etext was produced from Astounding Science Fiction September 1956. Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.] Hardwick knew the Survey ship had turned end-for-end, because though there was artificial gravity, it does not affect the semicircular canals of the human ear. He knew he was turning head-over-heels, even though his feet stayed firmly on the floor. It was not a normal sensation, and he felt that queasy, instinctive tightening of the muscles with which one reacts to the abnormal, whether in things seen or felt.…
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