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SlideshowReport

The Illusion of Martian Canals

Description
Giovanni Schiaparelli examined Mars through a 20-cm (8-in.) diameter
telescope, the same size used by many amateur
astronomers today. His drawings of the red planet showed
features perceived by Percival Lowell and others as irrigation
canals. Higher-resolution images from Earth and spacecraft
visiting Mars failed to show the same features
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