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Image-changing eclipse stamp to debut in Laramie – Laramie Boomerang

Laramie Boomerang Image-changing eclipse stamp to debut in LaramieLaramie BoomerangThe U.S. Postal Service is hosting the national release of its first-ever heat-sensitive 'thermochromic' stamps during a summer solstice event Tuesday at the University of Wyoming Art Museum. At room temperature, the stamps bear an image of a solar … More: …

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