NASA |
Two months before the eclipse, beginning June 20, the USPS will issue commemorative stamps that use "thermochromic ink, which reacts to the heat of your touch. Placing your finger over the black disc on the stamp causes the ink to change from black to clear to reveal an underlying image of the moon. The image reverts back to the black disc once it cools."
Send some snail mail, have fun, be safe, and hope for a clear day.
For East Coasters, the eclipse will peak around 2:45 pm EDT.
United States Postal Service |
United States Postal Service |
No comments:
Post a Comment