# #Mon Aug 09 11:49:32 CEST 2010 Text__TimS0KObEd-WfYQ0GneCwQ_title=The Round Umbra

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Aristotle argues early on that a lunar eclipse occurs when the umbra is cast on the Moon. Yet the naive belief that a dark force threatens to devour the Moon is widespread. Columbus intimidates hostile natives by predicting a lunar eclipse.