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They are a re-creation of the molecular structure of scent particles emitted by a real plum in a different country from where I sit, transported to summer on a January day, courtesy of Osmo Labs, which sent me the samples.

Wiltschko is now CEO of the company he founded out of that work, Osmo Labs, dedicated to, as its tagline puts it, “giving computers a sense of smell.”

Nobel Prizewinner Geoffrey Hinton, the “godfather of AI,” recently joined the board of Osmo.

A few months ago, Wiltschko’s Osmo Labs hit a major milestone: they digitized the smell of a freshly-cut plum.

There’s no particular limit to the kinds of smell that can be digitized, though Wiltschko says Osmo is at work on a database with the molecular compositions of everyday smells, such as everything you might find at the grocery store, for example.