USPS Launches World’s First “Color Changing Stamp”

In a bid to commemorate an upcoming solar eclipse, the US Postal Service released what it described as the world’s first color changing stamp. The stamp “uses temperature-sensitive ink to depict the stages of the eclipse. The ink becomes activated when someone places their thumb on the stamp, revealing that the dark mass over the sun, to be the moon.”

More importantly, it’s an interesting experiment in how to make the USPS more relevant and perhaps encourage people to send something directly from person to person, rather than just ordering from Amazon.