Science and Technology

Topical Reference Page
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Leavitt cancelling machine patent model

Find resources related to science and technology on the National Postal Museum's website.

60 cent Hubble Space Telescope stamp
Wonder at the mysteries of space and learn how telescopes have helped astronomers uncover them.

On December 2, 1942, the Manhattan Project’s team of scientists produced the world’s first self-sustaining nuclear chain reaction at the University of Chicago. To commemorate this important accomplishment, the Smithsonian National Postal Museum has created this mini-exhibit highlighting different objects with connections to this event.

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