Disdaining the possibility of invasion by hypothetical Martian monsters, astronomers and physicists have amused themselves and bemused laymen in recent years by formulating several ways in which the world may come to an end through the operation of natural law. One possibility is .that the sun may flare up as a nova, ("new star"), increasing enormously in temperature and brightness like scores of novae which have been observed at greater distances. Such an explosion in the sun would burn men and their Earth to a crisp.
Another prospect is that the moon, revolving around...
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