Other writers have put the blame on disease, parasites, . . . changes in the pressure or composition of the atmosphere, poison gases, volcanic dust, excessive oxygen from plants, meteorites, comets, gene pool drainage by little mammalian egg- eaters, . . . cosmic radiation, shift of Earth’s rotational poles, floods, continental drift, . . . drainage of swamp and lake environments, sunspots.” —The Riddle of the Dinosaur.
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