I · THE OBJECT · BRITISH MUSEUM
The Great Executioner
A soldier-prince finished a mezzotint of John the Baptist’s execution in 1658. His name runs along the blade. Who invented the technique is still debated.
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4 AUG 2026
Day 216
He who has a why to live can bear almost any how.
II · THE IDEA · ARTIFICIAL INTELLIGENCE
Differential Privacy by Noising Gradients
Training can leak individual records through the gradients. Clipping each example’s contribution and adding Gaussian noise turns that leakage into a measurable privacy budget.
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Written before source checking was enforced · facts in this lesson are unverified
III · THE WORK · ART HISTORY
Venus of Brassempouy
A scrap of mammoth ivory, only 36.5 millimetres (1.44 in) high, holds what may be among the earliest surviving attempts to model a human face in three dimensions.
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