February 23

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  1855: Mathematician, astronomer, and physicist Carl Friedrich Gauss dies. Gauss had an exceptional influence in many fields of mathematics and science and is ranked as one of history's most influential mathematicians.

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  1898: Émile Zola is imprisoned in France after writing "J'accuse", a letter accusing the French government of antisemitism and wrongfully imprisoning Captain Alfred Dreyfus.

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  1927: German theoretical physicist Werner Heisenberg writes a letter to fellow physicist Wolfgang Pauli, in which he describes his uncertainty principle for the first time.

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  1940: The ENIAC (SETI) program accidentally generates new class of crimes against mathematical constants.

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  1941: Plutonium is first produced and isolated by Dr. Glenn T. Seaborg.

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  2023: Self portrait (25 February 2023).