The U.S. Postal Service will soon release a first-of-its-kind stamp that changes when you

touch it.

The Total Solar Eclipse Forever stamp, which commemorates the August 21, 2017 solar eclipse over the United States, transforms into an image of the Moon from the heat of a finger.

A Total Solar Eclipse has not been seen on the U.S. mainland since 1979. And this eclipse will travel a narrow path across the entire country for the first time since 1918. The path will run west to east from Oregon to South Carolina and will include portions of 14 states.

A First-Day-of-Issue ceremony will take place at the Art Museum of the University of Wyoming on June 20, 2017, which also happens to be the date of the Summer Solstice.