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When an Eclipse Prevented a War
First Paragraph: | It is an historical fact that once, at least, a total eclipse of the Sun really prevented a war. Of course, the threatened war was not of the magnitude that shocked the world a few years ago, nor would ...
First Paragraph: | One way of drawing a cardioid is to make a pen start in phase 90° from the center of a disk and move along a radius with simple harmonic motion, while the disk revolves with a uniform angular speed of ...