The human face can express a world of emotions that wouldn't be possible without our eyebrows.
The research took place among 9,948 individuals, split across 4 different ancestral lineages, including those in Europe, the United Kingdom, the United States, and Australia.
Researchers identified three previously unreported genes tied to eyebrow thickness in those of European descent: SOX11, MRPS22, and SLC39A12. They also identified two other genes that were discovered in past brow research on non-Europeans: SOX2 and FOXD1. Meanwhile, another two genes reported in non-Europeans, EDAR and FOXL2, had no apparent effect in Europeans.
"By having demonstrated that eyebrow variation is determined by both shared and distinct genetic factors across continental populations, our findings underline the need for studying populations of different ancestries for unveiling the genetic basis of human traits, including, but not restricted to, physical appearance,"
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