the.com/bubble

a perfect sphere born from the laziest shape in physics: minimum surface, maximum drama.

means A thin film of liquid forming a hollow sphere of gas, or by extension any fragile, self-contained pocket — of air, of price inflation, or of comfortable isolation — that is prone to bursting.

from From Middle English bobel, almost certainly imitative — a word built to sound like the soft 'b' pop of air breaking the surface of water. It's a cousin of similar bubbling words across Germanic languages, like Dutch bobbel, where the lips themselves seem to mimic the thing being named. The financial sense (an inflated, doomed price) blew up famously with the South Sea Bubble, an early-18th-century speculative collapse that fixed the metaphor of fragile, swelling wealth in the language.

surface tension
Spheres minimize area, so bubbles round themselves automatically.
wall thinness
Soap films can thin to under one light wavelength.
color trick
Rainbow swirls come from light interference, not pigment.
pop speed
A bursting film retracts faster than the eye sees.
longest lived
A lab bubble survived 465 days before popping.
for instance

dotcom bubble — tech stocks crashed 78% from 2000-2002, wiping out trillions in value

housing bubble 2008 — us real estate prices fell 33% after subprime mortgages collapsed

tulip mania 1637 — dutch tulip bulb prices crashed 99% in weeks, first recorded financial bubble

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