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A shadow band project for August 21 | | Shadow bands are elusive ripples of alternate light and dark, flitting over the ground or the sides of buildings. How to take part in an International Shadow Band Campaign during the August 21 eclipse. | | |
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The story behind the 2017 eclipse stamp | | A first-of-its-kind stamp that changes when you touch it. It'll commemorate the total solar eclipse of August 21, 2017. Fred Espenak - whose photos are used on the new stamp - tells the story. | | |
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