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Dmitri Mendeleev's paper The Dependence between the Properties of the Atomic Weights of the Elements is read to the Russian Chemical Society in St Petersburg, arranging the known elements by atomic weight and valence and leaving gaps for elements not yet found.

Alan Turing submits "On Computable Numbers, with an Application to the Entscheidungsproblem" to the London Mathematical Society. It defines the abstract machine that became the model for every computer built since, and proves the Entscheidungsproblem undecidable.

At Ann Arbor, Thomas Francis Jr announced the results of the largest medical field trial ever run - 1.8 million children - and pronounced Jonas Salk's polio vaccine safe, effective and potent. Church bells rang across the United States; within two years American cases had fallen by almost 90 per cent.

Fischer Black and Myron Scholes give a closed-form price for a European option in the Journal of Political Economy, in the same year the Chicago Board Options Exchange opens. The formula becomes the language of the derivatives market.

Whitfield Diffie and Martin Hellman propose public-key cryptography and a way for two parties to agree a secret key over an open channel. It is the idea that later makes e-commerce and secure messaging possible.

Alex Krizhevsky, Ilya Sutskever and Geoffrey Hinton submit a deep convolutional network to the ImageNet challenge as team SuperVision and win by a wide margin. The result turns GPU deep learning from a niche into an industry.

The VA switched the Cincinnati, Chillicothe, Dayton and Fort Thomas medical centres to the Federal EHR, its second 2026 wave, serving more than 107,000 veterans.

Target's limited-time designer collaboration with New York designer Rosie Assoulin - dresses, sets, bags, sandals and her first home line, mostly under $50 - went on sale on 25 July 2026 with a launch event at Target SoHo.

Surly Brewing's free Darkness Day at its Minneapolis brewery on 3 October 2026 is the pickup for the 2026 Darkness imperial stout, whose 20th-anniversary label brings back the original 2007 Grim Reaper art, plus barrel-aged variants.

A year after its $9.1 billion takeover, Sanofi is laying off 229 former Blueprint Medicines staff and closing Blueprint's two Sidney Street offices in Cambridge, with separations from 9 October 2026 to late June 2027.

Phase 1 of Pure Water San Diego, a roughly $1.5 billion program, is due to start sending purified recycled water through Miramar Reservoir into the drinking supply near the end of 2026. It starts at about 7.5 million gallons a day and ramps to 30 million once the Morena Pump Station comes on line.