A total eclipse thermochromic stamp that changes when you touch it

doctorow Closed May 14, 2017, 10:21am 14

This topic was automatically closed after 5 days. New replies are no longer allowed.

Topic		Replies	Views
There's going to be scratch-and-sniff postage stamps this summer boing	9	808	May 27, 2018
'It was literally cold and dark': Total solar eclipse viewed throughout the U.S boing	42	2810	August 26, 2017
Look at these cool 1970s postage stamps from Bhutan, which are tiny vinyl phonograph records boing	21	810	July 12, 2022
Infamous "Inverted Jenny" Stamp No. 49 resurfaces a century later boing	20	1628	September 13, 2018
'You owe it to yourself to experience a total solar eclipse,' says science writer David Baron boing	37	2584	August 15, 2017