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the body's tiny curtain call, performed 15,000 times a day without applause

means To shut and reopen the eyes rapidly, usually involuntarily; figuratively, to flinch, hesitate, or back down in a tense moment.

from From Middle English 'blynken,' likely a variant of 'blenken,' meaning to shine or deceive — a tangle of senses around flashing light and momentary closing. It's a cousin of 'blank' and the older 'blenk,' and shares a family resemblance with German 'blinken' (to gleam, twinkle). The thread running through all of them is the brief flash: a glint of light, the quick flicker of an eyelid, the split-second wavering of nerve.

speed
A single blink lasts about one-tenth of a second
hidden cost
You spend roughly ten percent of waking life blind
brain trick
Your mind erases the darkness so you never notice
social tell
Blink rate spikes when you lie or feel stressed
newborns
Babies blink far less, just twice per minute
for instance

blink 182 — pop punk band formed in san diego, california in 1992

blink app — amazon-owned home security camera system launched in 2014

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