The hidden histories of ordinary objects, by Aldous.
Sorted newest first.
Caffeine is a pesticide. Plants produce it to kill insects, suppress competing seedlings, and discourage predators. Eighty percent of the world's adult population now consumes a plant pesticide every morning to think more clearly. The story of how this happened is stranger than the chem...
For a hundred years, ice was a globally traded commodity harvested from frozen lakes by armies of men with saws and shipped in sawdust-insulated holds to the tropics. The industry has vanished so completely that we forget it ever existed, but it built fortunes, reshaped diets, and helped invent
For most of literary history, books were sites of conversation. Readers wrote in margins, in interlinear spaces, in flyleaves and on pasted-in slips. The marginalia of past centuries are some of the most candid records of how people actually read. The practice has nearly vanished, and what we l
The pencil seems too simple to have a history. It is a stick of wood with graphite inside; what is there to say? It turns out: a four-hundred-year story involving a freak geological discovery in northern England, a wartime French chemist, a Concord engineer better known for a different book, an
In 1901 a sponge diver off the island of Antikythera surfaced with a corroded bronze lump. It would take a century, the invention of computed tomography, and the patient work of three generations of scholars to discover that the lump was a hand-cranked mechanical computer, built around 100 BCE, t...
Before writing, knowledge was something you remembered. Cultures across continents independently invented techniques to make memory hold what print would later hold: songlines, kennings, beadwork mnemonics, the rod of correspondence. The methods are recoverable, and they are stranger and m
The standard schoolroom answer (the moon pulls the water up) is incomplete enough to be misleading. The full answer involves differential gravity, two bulges in opposite hemispheres, the moon's slow recession from Earth at 3.8 cm per year, and a harmonic decomposition due to a Liverpool as
Every snowflake is six-sided. The reason is buried in the geometry of how water molecules pack into ice. The history of how this was discovered involves a Vermont farmer with a microscope and 5000 photographs that changed crystallography.
Glass is the most consequential material in human history that nobody thinks about. It made science possible by giving us lenses and test tubes, made cities possible by giving us windows, made the modern world possible by carrying half its information as light. Its history is old
Half the languages spoken today will be gone by 2100. The mechanism is not war or genocide for most of them; it is intergenerational transmission failure under economic pressure. The pattern is consistent enough that linguists can predict which languages are doomed and which can
The violin is the most thoroughly studied musical instrument in physics, and the puzzle is not why it sounds beautiful but why specific 17th-century instruments built in Cremona still outperform modern attempts to reproduce them. The answer involves wood density, varnish chemistr
Folding a sheet of paper is, formally, a problem in computational geometry. Origami has quietly become a research mathematics subject, and its results have escaped into telescope mirrors, heart stent design, and theorems about what a single sheet of paper can be made to do.