Skip to content
The Daily Triptych047 / 365

16 FEB 2026

Day 47

The eye altering alters all.

William Blake · The Mental Traveller
A brass ewer with a pear-shaped body, tall narrow neck, curved handle, and long spout shaped like a bird or dragon head, the surface densely inlaid with silver roundels containing courtly figures and Arabic inscriptions.

I · THE OBJECT · BRITISH MUSEUM

The Blacas Ewer

Jazira / Mosul · April or May 1232 · Brass inlaid with silver and copper

Shuja' ibn Man'a al-Mawsili signed his name and the city where he worked into the silver inlay of this ewer — a rare survival that anchors the study of an entire metalworking tradition.

Enter lesson 6 MIN

II · THE IDEA · ARTIFICIAL INTELLIGENCE

The KV Cache

Inference · Memory management for autoregressive generation · Transformer architecture (2017)

The first token requires computing attention across your entire prompt. Subsequent tokens reuse cached results, which is why long prompts cost more upfront but nothing extra per generated word.

Enter lesson 6 MIN

Written before source checking was enforced · facts in this lesson are unverified

A train crosses a bridge through heavy rain and steam, the locomotive a dark shape trailing white vapour. A small brown hare runs ahead on the rails. The stone bridge and landscape blur into streaks of grey, brown and gold.

III · THE WORK · ART HISTORY

Turner's Rain, Steam and Speed

J. M. W. Turner · 1843 · Oil on canvas

Turner painted a train at full speed by making almost everything in the picture dissolve — except the one animal moving faster than the engine.

Enter lesson 6 MIN

The daily email

Four lessons in your inbox, every morning at seven.

One object, one idea, one masterpiece, one game. Deep links to that day’s pages. Unsubscribe with one click, any time.