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Yesterday β€” 5 December 2025Main stream
Before yesterdayMain stream

In 1982, a physics joke gone wrong sparked the invention of the emoticon

20 November 2025 at 07:00

On September 19, 1982, Carnegie Mellon University computer science research assistant professor Scott Fahlman posted a message to the university’s bulletin board software that would later come to shape how people communicate online. His proposal: use :-) and :-( as markers to distinguish jokes from serious comments. While Fahlman describes himself as β€œthe inventor… or at least one of the inventors” of what would later be called the smiley face emoticon, the full story reveals something more interesting than a lone genius moment.

The whole episode started three days earlier when computer scientist Neil Swartz posed a physics problem to colleagues on Carnegie Mellon’s β€œbboard,” which was an early online message board. The discussion thread had been exploring what happens to objects in a free-falling elevator, and Swartz presented a specific scenario involving a lit candle and a drop of mercury.

That evening, computer scientist Howard Gayle responded with a facetious message titled β€œWARNING!” He claimed that an elevator had been β€œcontaminated with mercury” and suffered β€œsome slight fire damage” due to a physics experiment. Despite clarifying posts noting the warning was a joke, some people took it seriously.

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