U.S. Postal Service

Solar Eclipse Stamp
At room temperature, the ‘thermochromic’ Total Eclipse of the Sun Forever stamp depicts a solar eclipse, but becomes an image of the Moon from the heat of a finger. The image reverts back to the eclipse once it cools.
Operation Santa Claus Helps Families in Need
Many kids across Wyoming will have their Christmas wishes answered by perfect strangers, just because they dropped a letter in the mail. Writing letters to Santa is a timeless Christmas tradition, and for more than a century, Operation Santa Claus has allowed U...

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