সংক্ষিপ্ত বিবরন : In the Days of the Comet (1906) is a science fiction novel by H. G. Wells in which humanity is "exalted" when a comet causes "the nitrogen of the air, the old azote," to "change out of itself" and become "a respirable gas, differing indeed from oxygen, but helping and sustaining its action, a bath of strength and healing for nerve and brain." The result: "The great Change has come forevermore, happiness and beauty are our atmospheres, there is peace on earth and goodwill to all men."