New ‘eclipse’ stamp from U.S. Postal Service transforms with a touch

LARAMIE, Wyo. — The U.S. Postal Service has officially unveiled a first-of-its kind stamp that transforms with the touch of a finger and is dedicated to this summer’s total solar eclipse. The 49 cent stamp uses temperature-sensitive ink. When a person touches it, the body heat transforms the image of the blacked-out sun into the […]