Biological Energy Redistribution?

KUMAR5 said:
We were discussing about climatic impact on our losing fur. Both warm and cold climate should be accounted for it not just warm climate.
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IMO, you can account for just a warm climate. Even though there are furry animals in warm climates, this may not necessarily be related to climate at all.
A tree dwelling animal would not do well without a tough, furry hide, to withstand the cuts and scrapes from dwelling in an environment wich consists of sticks and rough surfaces.
When the first ground dwelling bipedal hominids appeared, the need for such protection was no longer required, considering that hunting in open spaces involved light weight, stamina, but still a way to stay cool. Thus the melanin in the skin turned dark as protection from direct sunlight radiation, the hair follicles evolved to sweat glands.
skin,
the outer covering of the body. The skin is the largest organ of the body, and it performs a number of vital functions. It serves as a protective barrier against micro organisms. It helps shield the delicate, sensitive tissues underneath from mechanical and other injuries. It acts as an insulator against heat and cold, and helps eliminate body wastes in the form of perspiration. It guards against excessive exposure to the ultraviolet rays of the sun by producing a protective pigmentation, and it helps produce the body's supply ofvitamin D. Its sense receptors enable the body to feel pain, cold, heat, touch, and pressure. The skin consists of two main parts: an outer layer, the epidermis, and an inner layer, the corium(or dermis).
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https://medical-dictionary.thefreedictionary.com/skin

As far as I know heavily furred are usually large and and slow and live in colder climates The Musk-ox is an example. However the once heavily furred mammoth evolved into almost hairless elephants, which need to cover their skin with mud, lest they get sun-burn.
 
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Write4U said:
IMO, you can account for just a warm climate. Even though there are furry animals in warm climates, this may not necessarily be related to...
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Actually, there is a wide variation in fur type inspite with similar environment i.e among species, among body parts, among gender, among individuals etc. Probably, there is some other reason to it than just climatic and need.
 
KUMAR5 said:
That was continuing post. Quoted poster had somewhat indicated, we are evolved without fur due to living in warm climate of Africa at our Ape state.
Wearing cloth environment persisted constantly since long back. This is also unique to humans. Why it can not be an evolved reason to losing our fur?
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Because we lost our fur before we started wearing clothing.
 
KUMAR5 said:
What was the main trigger to it,?
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The need to sweat effectively.

Early man was not as fast or as strong as other animals contemporary to him - but had more endurance. He could wound a deer, then follow the deer for miles. The deer would easily outrun him then tire, and eventually the hunter would catch up to the deer. In the hot environment he was in, being able to effectively cool himself was critical for this.
 
billvon said:
The need to sweat effectively.

Early man was not as fast or as strong as other animals contemporary to him - but had more endurance. He could wound a deer, then follow the deer for miles. The deer would easily outrun him then tire, and eventually the hunter would catch up to the deer. In the hot environment he was in, being able to effectively cool himself was critical for this.
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Does it not suggest that hot environment is only responsible for losing fur? No cold exposure.
 
spidergoat said:
Basically, yes.

Happened afterwards, and we aren't really that variable. Culture amplifies differences that may only be superficial.
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Now to OP:

Humans of the future may be physically weaker and more susceptible to pathogens

As already noted, evolution tends to favor the elimination of traits that are no longer needed. One trait that is a top candidate for elimination is our physical strength. Humans no longer require robust muscles to perform feats of strength. We now have machines, and other tools of our ingenuity, for those tasks. In fact, studies have already shown that we are much weaker compared to our distant ancestors. Future humans may therefore be more petite than we are today.
https://www.mnn.com/earth-matters/w...-human-evolution-5-traits-we-might-possess-in
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Does above quote support the idea of physically weaker and mentally stronger in future:

One poster, initially in this topic had presented one imaginary image which probably will match with future human.
 
spidergoat said:
I would guess using fire, or just sleeping in a hut might have done it.
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This quote can support your and mine idea:

Humans of the future may have less hair
Clothing, along with modern technology such as air conditioning and heating, has made the insulating properties of body hair obsolete. Although the evolutionary fate of body hair can be particularly difficult to project because it can also act as a signifier for sexual selection (i.e., body hair can be viewed as physically attractive, and thus be perpetuated within a population), it is likely that humans of the future will have much less body hair than they do today.
https://www.mnn.com/earth-matters/w...-human-evolution-5-traits-we-might-possess-in
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One more issue has popped up by above quote. Are we losing sexual attractiveness corresponding with loss of hair?
 
KUMAR5 said:
One more issue has popped up by above quote. Are we losing sexual attractiveness corresponding with loss of hair?
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No. We aren't losing facial hair. Anyway, sexual attractiveness is a cultural trait, not an objective measurement.
 
spidergoat said:
No. We aren't losing facial hair. Anyway, sexual attractiveness is a cultural trait, not an objective measurement.
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Cultural, social, scientific or modern, whatever may be, that will be an environment, whose consistence exposure for long term should become a reason to evolution. Many time I feel, full nude human body do not look so attractive and natural as other species look.
 
spidergoat said:
No. We aren't losing facial hair. Anyway, sexual attractiveness is a cultural trait, not an objective measurement.
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Indeed.
A woman with ghost white skin and a giant black mole on her cheek is still beautiful - if all the women in the world have ghost white skin and giant black moles.
Otherwise, we never would have survived the Elizabethan Era.

And taking that to the extreme, how does Kumar think we bred when humans were hardly distinguishable from apes?
 
DaveC426913 said:
The desire to reproduce is not going to hindered by too many strolls along the 'clothing optional' beach.
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True, it just takes the mystery (and ignorance) out of sex and begins to treat it like the natural function which it is.
It does not affect creativeness in sex though................:)
 
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