Reveal the Bright Side of the Moon with a Heat-Activated Solar Eclipse Stamp

There is no dark side of the new United States Postal Service (USPS) stamp, really. As a matter of fact, it’s all dark until you place your finger over its black circle, and then a luminous moon is revealed. The Total Solar Eclipse Forever stamp commemorates the coming August 21 eclipse, which will cross over the entire continental United States, the first such event since 1918.

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