----------

Tuesday, June 20, 2017

Collectible Stamp: These special solar eclipse stamps are on sale today


These special solar eclipse stamps are on sale today


Article Excerpt: "... The stamp is the first ever to feature thermochromic ink, which changes color when heated. When you rub the stamp, the black moon turns into a color photograph revealing the lunar surface. The stamps are available for purchase at the USPS website or your local Post Office ..."


Reference: www.popularmechanics.com