USPS Issues Total Eclipse of the Sun Commemorative Stamp
With the upcoming total solar eclipse on August 21, 2017, the United States Postal Service has issued a heat-sensitive commemorative stamp. The stamp is a photo of a total solar eclipse - a black moon highlighted by a solar ring. If you place a finger on one of the stamps, the heat from your finger changes the eclipse to a full moon.
Pretty darn clever.
The Total Eclipse of the Sun stamp is a Forever Stamp and costs 49 cents. I bought a couple of sheets; I think they'll be fun to use for Halloween-time mailings.