the.com/greying

the slow silvering proof you survived everything that tried to dye you young

means The gradual loss of pigment in hair as it turns grey or silver with age, or by extension the aging or fading of anything once vivid.

from From Old English 'grǣg,' the colour grey, which has Germanic cousins in Dutch 'grauw' and German 'grau.' The '-ing' is the familiar English suffix that turns a state into an ongoing process — so 'greying' is literally the act of going grey, happening to you one strand at a time.

pigment loss
Hair doesn't turn grey; it grows in without color
stress link
Acute stress can drain pigment-making stem cells permanently
reversible
Some stress-grey hairs regain color when calm returns
first strands
Most people spot grey by their mid-thirties
genetic clock
A gene called IRF4 helps time when you silver
for instance

badger population uk — badger hair naturally greys with age; uk badger culls began 2013 targeting disease spread

antarctic penguin colonies — chinstrap and gentoo penguins show greying plumage as they age, studied at south georgia since 1970s

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