Most humans have only one hair color and one eye color. Europeans are a big exception: their hair is black but also brown, flaxen, golden, or red; their eyes are brown but also blue, gray, hazel, or green. This diversity reaches a maximum in an area centered on the East Baltic and covering northern and eastern Europe. If we move outward, to the south and east, we see a rapid return to the human norm: hair becomes uniformly black and eyes uniformly brown.
Thus, some kind of non-random process seems to have targeted hair and eye color per se, that is, as visible characteristics. But how? And why? For some, including the geneticist Luigi L. Cavalli-Sforza, the answer is sexual selection. This mode of selection intensifies when males outnumber females among individuals ready to mate, or vice versa. The sex in excess supply has to compete for a mate and resorts to the same strategies that advertisers use to grab attention, such as the use of bright or striking colors.
heerrozenwater 
Heb je ook zo’n overzicht voor kale oude mannetjes?
Vriendelijke groet,
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Rob!!
Ik herken me hier ook absoluut niet in, gelet op Nederland. 😉
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Gefeliciteerd Rob!
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‘Rood haar en elzenhout is niet op goede grond gebouwd’
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…maar ach, waar doe je het voor? Rob overtreft je niet.
Dikke LOL overigens.
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‘overtref’ dus – een aanmerkelijk verschil
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Waar zijn de legenda’s?
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In Afrika, het Midden-Oosten en zo hebben mensen kennelijk geen haar- en ogenkleur
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Jawel, kijk maar naar Israel.
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In Afrika, een groot deel van het Midden-Oosten en zo hebben mensen kennelijk geen haar- en ogenkleur
😉
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Most humans have only one hair color and one eye color. Europeans are a big exception: their hair is black but also brown, flaxen, golden, or red; their eyes are brown but also blue, gray, hazel, or green. This diversity reaches a maximum in an area centered on the East Baltic and covering northern and eastern Europe. If we move outward, to the south and east, we see a rapid return to the human norm: hair becomes uniformly black and eyes uniformly brown.
https://www.sscnet.ucla.edu/comm/steen/cogweb/ep/Frost_06.html
Thus, some kind of non-random process seems to have targeted hair and eye color per se, that is, as visible characteristics. But how? And why? For some, including the geneticist Luigi L. Cavalli-Sforza, the answer is sexual selection. This mode of selection intensifies when males outnumber females among individuals ready to mate, or vice versa. The sex in excess supply has to compete for a mate and resorts to the same strategies that advertisers use to grab attention, such as the use of bright or striking colors.
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Aha, dus ik heb me suf gewedijverd. 😉
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Kleurig Europa
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Zit ik dan met m’n bruine ogen…
There’s a place for us
Somewhere a place for us
Peace and quiet and open air
Wait for us
Somewhere
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Goeie, Rob! Gefeliciteerd.
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