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Dara Sloane's avatar

On the blonde vs brunette dissonance: hair darkens with age, but it also lightens with age (grey). So while blonde hair may carry a youth signal relative to the darker hair of early adulthood, a rich, greyless brunette can carry a stronger youth signal later on. In other words, “lighter = younger” isn’t quite a monotonic relationship across the lifespan.

Nazar Androshchuk's avatar

The arbitrary zero on the x-axis is weighted towards the average man rather than the average woman. Cool.

Edit: I rescanned to check and it wasn’t so obvious. Maybe just every time it is as above it really jumps out at me. Interesting nonetheless. My preference is if it was centred on the average woman consistently.

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