Questions tagged [human-evolution]

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

Filter by
Sorted by
Tagged with
0
votes
0answers
28 views

What factors led to the evolution of humans in Africa rather than the New World?

I learnt at the zoo that the ancestor of monkeys existed in the Africa/South America supercontinent, but then took different paths once the two continents diverged: Old World monkeys lost their ...
-1
votes
0answers
36 views

Why are there multiple eye colors?

Human eyes vary in color between people. Why are there multiple colors? Any continuous property of the body, like arm length, varies during the evolution, there are changes between it's value of a ...
-4
votes
1answer
74 views

Has human intelligence evolved as a costly male signal?

In this video at 42:06, Daniel Dennett posits that our big brains are: The human artifice or version of the peacock's tail. Peacocks have sexual dimorphism - it's males who exhibit the costly ...
0
votes
0answers
42 views

What is the scientific consensus on whether humans were monogamous during the period of evolutionary adaptedness?

The book The Mating Mind by Geoffrey Miller asserts, as part of its thesis, that humans were not monogamous in the environment of evolutionary adaptedness. I found the book vivid and persuasive, but ...
0
votes
1answer
32 views

Does Japan have an ageing population? [closed]

I often hear Japan has a declining/ageing population. It seems to be the prime example for this kind of thought. Yet after moving to Japan and after having been there for travel several times already. ...
1
vote
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 ...
1
vote
2answers
117 views

Why do women process oxygen faster than men?

https://www.newsweek.com/women-are-better-athletes-men-study-about-gender-fitness-says-736047 is the source that I use. Is it reliable? What's the evolutionary advantage to women being naturally more ...
5
votes
1answer
142 views

Human evolutionary innovation for rapidly restoring glycogen, and link to cardiovascular disease?

I'm a physicist, not a biologist, but I'm interested in human evolution and its link to the physiology of endurance sports. Circa August 2019, I read an article in the newspaper whose contents I'll ...
-2
votes
1answer
38 views

What are the genetic basis for further classification of human beings? [closed]

According to anthropology, human race further gets divided in Caucasians, Mongoloids, Aboriginals, Eskimos, Red Indidians and Negro's. How far, is this classification, though maybe anthropologically ...
1
vote
0answers
69 views

What are the sufficient criteria that make an entity a living homo sapiens? [closed]

When I say criteria I mean like x biological functions or y genetics. If it were to be appearance,anatomy. A corpse completely looks like a man. Moreover a person who has had their 4 limbs amputated, ...
-1
votes
1answer
47 views

Is there a name for survival of the fittest in a single family? [closed]

Imagine a case where the children of a bird each have a 50% chance of being born blind. But the bird always has on average 4 chicks. So on average 2 will be blind and 2 sighted. (Perhaps this could ...
6
votes
2answers
168 views

What are the evolutionary reasons behind men being taller than women?

Human men and women are sexually dimorphic: there are some phenotypic differences between men and women. Men being taller than women is an accurate stereotype. Overall, men are on average 13 ...
-2
votes
1answer
72 views

Why has reproduction evolved as a choice? [closed]

From an evolutionary perspective, the purpose of an organism is to pass along its genes through reproduction. However, as humans we have a choice if we want to reproduce or not. The good feeling from ...
1
vote
1answer
101 views

Is the Lucy fossil really what scientists claim it is?

The New Scientist has an article talking about how a baboon bone was found in the Lucy skeleton. Creationist sites like this, https://christiannews.net/2015/04/23/evolutionary-embarrassment-part-of-...
2
votes
2answers
92 views

Have humans evolved to live longer?

Do people live longer only because of better hygiene, medicine, society etc or also because they're slowly evolving to live longer under same circumstances?
1
vote
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 ...
-4
votes
1answer
64 views

Why do we develop addiction? [duplicate]

Recently, while on the train, I saw a person not holding the handrails on purpose. He decided that playing a game with no outcome whatsoever was more important than his safety. In fact, he bumped into ...
1
vote
2answers
226 views

Why are (some) human men sexually attracted to female breasts?

Many human men are sexually attracted to female breasts. Is there an evolutionary reason for this?
4
votes
1answer
103 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 ...
1
vote
1answer
54 views

What proportion of the people who lived 1000 years ago have genetic descendants alive today?

For context, I've been wondering about this for a paper I'm writing (in philosophy). Really, I want to figure out the chances that someone alive today will end up still having descendants 1000 years ...
1
vote
1answer
34 views

How to interpret a phenotypic frequency density plot

I just read a paper that ran an evolutionary agent-based simulations aimed to test how genetic preparedness and social learning affect survival in various environmental conditions (changing ...
0
votes
0answers
25 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 ...
0
votes
1answer
55 views

Why has the human eye evolved to become sensitive only to the visible light? [duplicate]

The human eye has evolved to become sensitive only to visible part of the electromagnetic spectrum. Why? Why is infrared vision disfavoured for us by evolution but not for some other animals? I am not ...
1
vote
2answers
117 views

Rationale behind Most Recent Common Ancestor (MRCA)?

My main question is this - I heard Richard Dawkins say in a video that after 1000s of years, any given individual alive today will be either an ancestor to ALL of the humans (in that future time) or ...
0
votes
0answers
51 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 ...
-1
votes
2answers
102 views

Evolution versus Creationism [closed]

If nature, or any aspects of it, are intelligently designed, how could we tell? How would we be able to test that hypothesis?
0
votes
0answers
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 ...
0
votes
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?
0
votes
1answer
44 views

If an ethnic group holds nearly 100% of a particular haplogroup, does it means that people who have this haplogroup are their descendants?

Let me give you a hypothetical example. If the Egyptians were 100% E3b1, and the Levantines 50%, and the Anatolians 25%. Does this indicate that the Levantines and Anatolians are descended from ...
0
votes
2answers
135 views

Would prehistoric humans have been considered negroid or australoid by modern standards? [closed]

What are your thoughts about this? For myself I think that the subject statement is rather obvious isn’t it, since Africans, & especially Australian Aboriginals, have the most archaic features &...
0
votes
0answers
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 ...
0
votes
0answers
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 ...
1
vote
1answer
46 views

If mammals evolved to be nocturnal, then how did we get so staunchly diurnal in such short time?

Much of human health revolves around sleeping well through the night. We know about circadian and body temperature rhythms which make us sleepy at night, peak melatonin production in the middle of ...
1
vote
2answers
97 views

How can skull size difference alone explain behavioral differences using evolutionary theory?

I just started Robert Sapolsky lectures series on Youtube on Human behavior biology, and on the second lecture, at this point, he is explaining how evolutionary biology can be used to predict lots of ...
1
vote
0answers
30 views

(secondary) human/primate advantages over other animals? [closed]

I am trying to understand the advantages that humans have over other species, besides what you could call 'sentience-critical'. What I mean by this is, the first set of answers you'll get is "more ...
2
votes
1answer
54 views

Why don't primates have galactose-alpha-1,3-galactose (alpha-gal), but other mammals do?

I read in wikipedia that: Galactose-alpha-1,3-galactose, commonly known as alpha gal, is a carbohydrate found in most mammalian cell membranes. It is not found in primates, including humans. My ...
2
votes
1answer
105 views

How valid are Koestler’s criticism of evolutionary theory?

I recently read Arthur Koestler's 1967 book The Ghost in the Machine. In it, Koestler criticises the neo-Darwinian theory of evolution—beneficial random mutations preserved by natural seleciton—as ...
2
votes
1answer
237 views

Why would pedophilia exist? [duplicate]

From an evolutionary perspective, why would anyone ever be sexually exited by small children who could not possibly have started puberty? Is it a confusion between some combination of sexual and non-...
4
votes
1answer
94 views

Skin Colour in “Northern” Regions of The earth

Question: Netflix has recently produced a two-part miniseries, The Evolution of US, that examines the evolution of "man". The topic of of human skin colour was covered and it was stated that 'lighter ...
0
votes
1answer
143 views

Why is melanin black? [duplicate]

I understand that the function of melanin is to protect individuals from sunlight, and that people living in sun exposed areas are darker due to increased production of melanin. But why is the melanin ...
-3
votes
2answers
70 views

quadrupedalism in human [closed]

Recently I saw a BBC documentary on a family from a remote village in turkey where one couple has 18 children and out of which 5 are walking on four legs. These children are 28-34 yr old & have ...
0
votes
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 ...
1
vote
0answers
95 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 ...
2
votes
2answers
104 views

Why don't vegetables taste good despite being healthful? [closed]

This is more a question about the evolution of taste than about the chemical composition of vegetables. Why don't vegetables taste good despite being healthful?
4
votes
2answers
129 views

What is meant by “50% related to sibling” versus “95% related to chimpanzee”?

Obviously I am more related to my sister than to a chimpanzee, so what do these different percentages actually refer to? Here is my preliminary research: https://genetics.thetech.org/ask-a-...
-1
votes
1answer
95 views

What makes red meat less healthy than seafood, after millennia of evolving to eat meat? [closed]

We are told that red meat is carcinogen; fish and white meat are not. What make us not "compatible" to red meat after thousands of years of evolution and meat eating, and yet seafood is opposite ?
2
votes
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 ...
1
vote
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 ...
1
vote
0answers
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 ...
-2
votes
1answer
73 views

Does natural selection in humans work out in “best outcomes” or do e.g. subjective biases affect it?

Does natural selection in humans work out in "best outcomes" or do subjective biases affect it? That is, how much is natural selection "guided by nature" and "guided by humans"? E.g. given "fully ...