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Questions tagged [human-evolution]

The study of evolution with a particular focus on questions about the evolution of modern humans.

33 questions with no upvoted or accepted answers
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4
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1answer
84 views

Does eating hard food really cause wisdom teeth to erupt properly?

According to the article Bad molars? The origins of wisdom teeth, in our evolutionary history, people were eating harder food like nuts and had unimpacted wisdom teeth. Later, that article appears to ...
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193 views

Were Neandertals as Hairy as We Are?

What I mean to say regards facial and androgenic hairs. There are many theories as to why some people have both kinds of hairs, while others have one or the same and others still have neither. The ...
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0answers
101 views

What niche was humanity theorized to fill before we possesd weapons and coordination to hunt & kill large prey?

I'm really interested in evolution, and for a err 'hobbyist' I think I understand a good bit of evolution and adaptation and the role it has played in many species. However, I feel I'm rather ...
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0answers
37 views

Are mosquitoes actually louder than similar flying insects, or have we evolved to hear them?

I've come across many flying insects smaller than the common housefly, but (anecdotally) the only such species that I can hear from an appreciable distance away is the mosquito, with its distinctive ...
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45 views

Around what time did dark skin disappear from Europe?

As Europeans gradually became lighter skinned, there would have been people that still had dark skin. Around what time period did Europeans become completely light skinned?
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51 views

What natural defence mechanism does the human body have against lead poisoning?

It is known that lead ion takes place of necessary ions, like calcium, in the body, but does not perform their task, hence wrecking the system. So how does the body eventually recognise this threat ...
2
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0answers
91 views

Is there any evolutionary significance of downward facing nostrils in human beings?

The nostrils in apes and monkeys are almost at the front, but in humans nostrils (external nares) face downwards. Also a lot of non-primate mammals like goats have nostrils at the front. Is it the ...
2
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0answers
574 views

Are humans getting taller, shorter, staying the same height?

This post stems from this question, and specifically this article, which was provided within a response. From what I gathered, the article attempts to make a correlation between the size of a ...
2
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0answers
210 views

What is the biology behind human population dynamics?

A paradox: Human population growth looks a lot like a simple logistic growth pattern. But the simplest interpretation of logistic growth doesn't seem to fit. Is this peculiar to humans, or does it ...
2
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0answers
47 views

How detailed a construction of the family tree of known human fossils do we have?

For the sake of this question, by "human" I mean Hominina. The best I could find is this, which isn't very detailed. Of the dozens of paleospecies we'd seek to link up, do we have a more detailed tree ...
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193 views

Have people in Africa already started evolving resistance to AIDS?

Are people living in areas where AIDS is rampant (for e.g. Africa), less likely to die from it than they once were because some of the people without genes/mutations that give them resistance already ...
1
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0answers
37 views

Do pale skinned people show other low light adaptations?

So, pale skin is, fundamentally, an adaptation to living in low light conditions. Pros: reduce energy spent on producing melanin, increase vitamin D production. Cons: more vulnerable to sunburns and ...
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0answers
52 views

Is it tautological that all living humans descended from a single male and single female human ancestor?

Many popular science articles cite high sequence conservation of mitochondrial DNA and the Y chromosome among living people as evidence that all humans are descended from a single male and single ...
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0answers
91 views

What is the evolutionary advantage of getting hard nipples when being aroused? Why can they even be stimulated sexually?

I try to understand the evolutionary advantages of the body reactions of nipples and penises/vaginas. I'm confused, because I can explain the evolutionary advantage in a logical & consistent way ...
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0answers
4k views

What is the occipital bun, precisely (in Neanderthals and Homo Sapiens)?

I've read that the occipital bun is an anatomical feature of the Neanderthals, and only because modern humans (except sub-Saharan Africans) carry a few percent of Neanderthal DNA due to ...
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23 views

Are there any open phylogenetic projects that don't require coding to make a contribution

I am stay at home learner, not pursuing education formal education and currently doing a part time job. I've however completed masters in biotechnology and I'm studying to pursue PhD in molecular ...
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34 views

What percentage of a complete Denisovan genomes lives on in the union of the sets of overlapping pieces in extant humans

In studies like this one mapping out distributions around the world or the analysis described in this article (suggesting a contribution from a non-Denisovan but Denisovan-like unidentified hominin to ...
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0answers
57 views

Sub-saharan africans (Andamanese, Semang) have the ancestral hair-type, do they also have pediculus humanus capitis lice?

Do humans with the ancestral hair-type also have pediculus humanus capitis lice? Pubic hair lice, Pthirus pubis, are adapted morphologically to cling onto coarse body hair, and originates from ...
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0answers
51 views

In this poisson distribution in olfactory receptor (OR) pseudogenes neutral mutation rate, how is the mean used?

The 2005 paper A comparison of the human and chimpanzee olfactory receptor gene repertoires describes a poisson distribution, with a mean of 0.701 From that mean, how is the gene disruption rate of ...
1
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0answers
192 views

Are there hyoid bones of Homo habilis in the fossil record?

Hyoid bones have been found for Homo erectus, Homo neanderthalensis, Australopithecus afarensis, and some more hominids. Have hyoid bones been found from Homo habilis? References: Capasso, L., E ...
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61 views

Different number of flaps in heart valves

Can anyone tell me why the different valves of heart have different number of flaps is it in any way related to evolution of homo sapiens.
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135 views

What were the Neanderthal innovations?

At some point the neanderthal and modern human lineages diverged. I'm not sure what exactly their most common recent ancestor was (I see some sources suggesting homo heidelbergensis), but in any case ...
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73 views

Why were the earliest humans hunter gatherers instead of fruit eaters living on trees?

How is it that the earliest humans who evolved from primates (who live on trees and mostly eat fruit) became hunter-gatherers (which seems like a harder, more stressful and more dangerous way to find ...
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0answers
23 views

How do crossbreeding with Neanderthals affect the genetic difference between ethnic groups?

I do not know exactly how much Neanderhtal/Denisova DNA non-subsaharan peoples carry around today, but I have heard figures of less than two percent in Europe, up to three percent in East Asia and ...
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50 views

Why does it seem like there is very little disparity between races in regards to intelligence

There is numerous biological difference between human races, from height to average BMI to various organ size. Oddly however there is very little disparity in regards to intelligence (when accounting ...
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25 views

Are genes for producing heterozygotic twins sweeping?

The tendency for a woman to ovulate two or more eggs at once, which may results in a heterozygotic multiple births is the way I understand it at least to some part genetic. At least since the ...
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0answers
14 views

why is multiple blunt end repairs for one sample necessary

when is it necessary to prepare more than one blunt end repair library from an ancient DNA Extract? and what does it achieve?
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25 views

Do the normal in vivo spatial growth controls, not apply to hair follicles?

The common changes in hair growth are linked to changes in the size enlarging anagen follicles achieve. According to the accepted science in tissue physiology, the in vivo growth of the anagen ...
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33 views

Why do some people have a fear of depths?

I'm asking this question on this website because I want an evolutionary reason rather than a reason of how the human brain works. In one episode of "The Nature of Things," I heard David Suzuki say he ...
0
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1answer
59 views

Does drying meat in the sun make digesting it easier?

I was looking into the relationships between man, fire, brain size, evolution, etc. and I learned about other methods of food preparation that eased digestion, but did not use fire. Then, this ...
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40 views

Carbohydrate diet and dental health

I read that human started carbohydrates rich diet after adopting agriculture before that meat was main energy source which has comparatively less carbohydrate. High carbohydrate started destroying ...
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1answer
69 views

single use traits

Are there any known traits (in any organisms) that serve exclusively one purpose? (Counterexample: Giraffes long neck help them reach less available food AND communicate sub-sonically). If so is ...
-2
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1answer
248 views

Sex and human's sexual urge.

Why is it necessary for humans to feel pleasure while having sex? Why is it that other animals don't need to experience it? Is it evolutionary ? Why do we mate for pleasure when it's so energy wasting/...