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
1
vote
1answer
78 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-...
-5
votes
0answers
41 views

Scientifically & philosophically, is it fair to say that our faces do not represent our real selves? [on hold]

Scientifically & philosophically, is it fair to say that our faces & bodies do not represent our real selves, considering that they are made of flesh, skin, muscle, bones, etc., rather than ...
-1
votes
1answer
38 views

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

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 ...
-1
votes
1answer
57 views

Why has reproduction evolved as a choice?

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 ...
3
votes
1answer
44 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
2answers
80 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
47 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 ...
-3
votes
0answers
33 views

Why aren't there several human-like species on terra?

Just as there are several species of parrots, several of chimpanzees & monkeys, why aren't there several species like Homo sapiens on Earth? Or was the survival of the fittest way too bottlenecked ...
1
vote
2answers
100 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 ...
1
vote
2answers
96 views

Books about human evolution [closed]

I want to read some books about human evolution and about other extincted types of humans. The book "Sapiens: A Brief History of Humankind" writes about history of agricultural and scientific ...
-4
votes
1answer
58 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
183 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?
2
votes
0answers
46 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
48 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
33 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
26 views

Why can things taste too sweet?

My teachers in school always said that sugar tastes good because in the days of cavemen, things like berries, with lots of sugar, were rare, and it would be good to want to get the energy from them ...
0
votes
1answer
47 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 ...
0
votes
0answers
18 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 ...
4
votes
1answer
394 views
13
votes
2answers
789 views

Do all living humans literally descend from one ape?

In the opening chapter of Sapiens, Harari writes: Just 6 million years ago, a single female ape had two daughters. One became the ancestor of all chimpanzees, the other is our own grandmother. Is ...
0
votes
1answer
45 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 ...
0
votes
0answers
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 ...
3
votes
1answer
433 views

Is the “freeze response” really a remain of our reptilian past?

I'm looking for any reliable sources relating the common-known human reaction on a stressful situation, humans sometimes freeze and can not move. From some materials found on the internet I got that ...
-1
votes
2answers
96 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?
3
votes
3answers
282 views

Have humans finished evolving?

I thought that massive changes among organisms are over long periods of time. This is caused by, to my knowledge: Evolutionary pressure Natural/artificial selection Mutations Genetic drift Will ...
8
votes
2answers
2k views

Why do humans grow taller than their ancestors?

I'm taking the Introduction to Genetics And Evolution course and in the first lecture it was said that: Evolution in a biological sense is simply a change through time. And very importantly, that ...
35
votes
1answer
7k views

Does it make sense to classify all humans in a single species?

For what biological reasons do we consider that all human beings belong to the same species? A Thai and a Nigerian share a common ancestor that is 140,000 years old (see Gravel et al. 2010 and this ...
84
votes
6answers
29k views

Are humans the only species who drink milk as adults?

I was drinking a glass of milk the other day and that got me thinking that no other animal to my knowledge drinks milk past their infant stages. One could argue that cats might but it isn't good for ...
36
votes
7answers
12k views

Is evolution a fact? [closed]

Richard Dawkins in one of his videos says that Evolution is a fact and not just a theory. He goes on to say that man and chimpanzees both evolve from apes. Is this correct (Is evolution a fact and ...
81
votes
5answers
25k views

How could humans have interbred with Neanderthals if we're a different species?

To be clear, I'm not doubting that homo sapiens and homo neanderthalensis did interbreed: of that much I'm convinced. Within the past few years I've seen an upcropping of pop-sci articles discussing ...
0
votes
1answer
26 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 ...
11
votes
2answers
2k views

Online phylogenetic tree of human lineages

I am looking for a source of information about the diversity of human lineages and their relationships. With a quick google search it is easy to find this type of tree A perfect online resource ...
0
votes
0answers
24 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 ...
1
vote
2answers
96 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
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 ...
-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 ...
1
vote
1answer
41 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 ...
0
votes
2answers
204 views

Is happiness or pleasure an evolutionary programming for survival?

I think that whenever we feel some kind of happiness or pleasure it is always related with improving our chances of survival, that might be temporarily or in long term, might be of only of an ...
1
vote
2answers
86 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 ...
2
votes
2answers
3k views

Why aren't there any transitional animals today?

You have probably heard this question before and in different formats. Usually, it is used as a "proof" to disprove the theory of evolution. I understand that the apes we descended from are not the ...
1
vote
0answers
29 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
52 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
94 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
166 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
91 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
89 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 ...
2
votes
2answers
94 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
1k views

Why are humans so variable in appearance

Most animals look almost identical to their peers. To distinguish lions we record the spots on their face; with whales we look at the blemishes on their tail or flukes. In other words, we have to try ...