Quora, my response to 'Why is beard hair different from scalp hair?'.
Op zondag 26 december 2021 om 03:11:54 UTC+1 schreef DD'eDeN aka note/nickname/alas_my_loves:Mermaids have hair, not beards!!
Quora, my response to 'Why is beard hair different from scalp hair?'.??
Haven't you read 1985 Med.Hypoth.16:17-32
"The aquatic ape theory: evidence and a possible scenario".
Op zondag 26 december 2021 om 03:11:54 UTC+1 schreef DD'eDeN aka note/nickname/alas_my_loves:
Quora, my response to 'Why is beard hair different from scalp hair?'.
??
Haven't you read 1985 Med.Hypoth.16:17-32
"The aquatic ape theory: evidence and a possible scenario".
Quora, my response to 'Why is beard hair different from scalp hair?'.
Coarse hair (beard hair, axillary underarm hair and genital hair) is associated with skin glands that produce scent, a retention of our anthropoid ancestral reproductive physiology.
Body hair is a retention of our mammal ancestral temperature control physiology, thermo-insulation, reduced in length due to the adaptation of nocturnal sheltering, diurnal clothing, and domestic fire by paleolithic people.
Scalp (head) hair is a retention of our primate ancestral fur that has been modified by ancestral environments, tightly coiled in hot tropical zones (shading while ventilating scalp), straight in cold temperate zones (providing insulation).
Pregnant women/mothers grow thicker longer scalp hair, which gave piggyback-riding (or floating in water) toddlers an easily grasped part of her while keeping her hands free to forage and process food.
(I didn't mention speech, domeshields nor obligate orthograde bipedalism, for brevity).
DD'eDeN aka note/nickname/alas_my_loves wrote:
Quora, my response to 'Why is beard hair different from scalp hair?'.
Coarse hair (beard hair, axillary underarm hair and genital hair) is associated with skin glands that produce scent, a retention of our anthropoid ancestral reproductive physiology.
Body hair is a retention of our mammal ancestral temperature control physiology, thermo-insulation, reduced in length due to the adaptation of nocturnal sheltering, diurnal clothing, and domestic fire by paleolithic people.
Scalp (head) hair is a retention of our primate ancestral fur that has been modified by ancestral environments, tightly coiled in hot tropical zones (shading while ventilating scalp), straight in cold temperate zones (providing insulation).
Pregnant women/mothers grow thicker longer scalp hair, which gave piggyback-riding (or floating in water) toddlers an easily grasped part of her while keeping her hands free to forage and process food.
(I didn't mention speech, domeshields nor obligate orthograde bipedalism, for brevity).
Beard hair, in males of course, is a puberty indicator. Other locations of body hair, pubic, underarm, are likewise puberty indicators. Thus reproductive ability is displayed.
It is also significant that this hair has a function for scent dispersal.
Since males also can have long hair, that undercuts the notion that in females it was for
toddlers to hang on to.
Haven't you read 1985 Med.Hypoth.16:17-32
"The aquatic ape theory: evidence and a possible scenario".
Haven't you read 1985 Med.Hypoth.16:17-32I read here several irrelevant or idiotic reactions,
"The aquatic ape theory: evidence and a possible scenario".
but here's the relevant passage from
"The aquatic ape theory and some common diseases"
Med.Hypoth.24:293-300, 1987:
Head and trunk dermatoses
There is a group of skin & hair disorders of head & upper trunk that are
- very common,
- uniquely human,
- mainly hereditary,
- androgen-induced,
- non-itching, painless & merely cosmetic.
Acne vulgaris, an inflammation of the sebaceous follicles (SFs), is more prevalent around puberty & in males.
SFs exist only in humans, and are activated by dihydrotestosterone (DHT).
In the affected areas, the patients have an increased 5-alpha-reductase activity, that converts testosterone into DHT.
SFs are mainly situated at the forehead, cheeks, chin, upper ventral chest & between the shoulders.
Recently we suggested that the sebum of the SFs once kept the hairs waterproof & well-fitting to the body, so that the male’s neck was streamlined for a swimming life-style (1985).
A similar combination of hairs & sebum is shown by the adult male Steller’s sea-lion Eumetopias.
Seborrheic dermatitis (SD) is partly hereditary (caused by Pityrosporum yeasts belonging to our normal microflora), and more common in young adult men.
It mainly consists of scales & scurf at the naked/hairy boundary of the scalp (dandruff), beside the nose, beneath the brows, inside & behind the ears, and presternally.
When we sketch SD, SFs & head hairs (DHT induces longer-growing brows, male pattern alopecia & presternal hair) upon a reconstruction of a Pliocene male ancestor swimming under water (1985), the localization is very remarkable & typical:
- scales at the origins of the hairs,
- sebum under the shafts of the hairs.
Since our ancestors never used shampoo, we may suppose that the scales stuck amid the hairs, end even made a scaly layer over them, as in serious cases of dandruff (SD).
Scales & hairs were glued together by the sebum oozed by SFs underneath the hairs.
...
IOW, every medical doctor with a little knowledge of dermatology immediately sees the connection.
For why women (less DHT) evolved longer head hairs & less sebum than men, see Elaine Morgan.
Quora, my response to 'Why is beard hair different from scalp hair?'.
Coarse hair (beard hair, axillary underarm hair and genital hair) is associated with skin glands that produce scent, a retention of our anthropoid ancestral reproductive physiology.
Body hair is a retention of our mammal ancestral temperature control physiology, thermo-insulation, reduced in length due to the adaptation of nocturnal sheltering, diurnal clothing, and domestic fire by paleolithic people.
Scalp (head) hair is a retention of our primate ancestral fur that has been modified by ancestral environments, tightly coiled in hot tropical zones (shading while ventilating scalp), straight in cold temperate zones (providing insulation).
Pregnant women/mothers grow thicker longer scalp hair, which gave piggyback-riding (or floating in water) toddlers an easily grasped part of her while keeping her hands free to forage and process food.
(I didn't mention speech, domeshields nor obligate orthograde bipedalism, for brevity).
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