Questions tagged [human-evolution]

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

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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 ...
JohnWDailey's user avatar
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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 ...
dsollen's user avatar
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Why is the spinal cord shortened in some vertebrates (cauda equina) but not in others?

Hodos, 2009, mentions that the "spinal cord tail" that humans have is not present in most vertebrates. This page mentions cauda equina is not present early on in human embryonic development, ...
kRicket's user avatar
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Genetic differences between Africans and non-Africans due to cross-breeding with Neanderthals?

It is estimated that soon after the "out of Africa event" there was some interbreeding between Homo sapiens sapiens and Homo neanderthalensis. All non-African peoples are thought to have ...
Agerhell's user avatar
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Do human lungs have more protection against smoke compared to other animals?

Our ancestors have used fire for more than a million years. Wood smoke is not good for the lungs, but our ancestors were depended on fire. Especially in colder regions of the World like in Europe, ...
Count Iblis's user avatar
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Shrinking size of Y chromosomes

I read on the web that the size of Y chromosomes decreased in earlier period of time and the picture below tells that it is still occurring. So basically I want to know what caused this shrinking and ...
Ankit's user avatar
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Genetic variance for a behavioural trait among human populations

From this article from The Guardian: We instinctively assume that differences in behaviour that are in fact due to culture must be linked to – even caused by – characteristics of appearance. That ...
Remi.b's user avatar
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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 ...
Sean Lake's user avatar
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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 ...
toogley's user avatar
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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 ...
tparker's user avatar
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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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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 ...
Prem's user avatar
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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 ...
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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 ...
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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 ...
J.G.'s user avatar
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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 ...
Timothy's user avatar
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evolution of a preference for cooked meat

When I got a meat thermometer a few years ago, I was startled at how low optimal cooking temperatures are for beef, less that 140 degrees Fahrenheit. Also, as a kid, I remember reading that the desert ...
David Gudeman's user avatar
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DNA from Egyptian Mummies Evolution vs Human of Today

Comment: I ask my biological questions from the point of view of mathematical proportions. I am not a biologist. Are there significant differences in DNA from Egyptian Mummies vs. those available from ...
joseluisbz's user avatar
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Biological reason for "deadlift face"?

Always when I deadlift at the maximum load, my face looks more or less like this: or this: The same applies for when I do other heavy-weight exercises. But what biological mechanism causes that? ...
user46147's user avatar
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What is the evolutionary advantage of breathing and heart beats syncing between partners?

I recently read that partners who are close to one another usually when touching have their heart beats and breathing in sync. Why does this occur? What is the benefit of it occurring? How does this ...
James's user avatar
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Why is it that only humans are ashamed of certain critical biological activities

Humans are ashamed of certain activities that are critical to our survival. Examples: mating, defecation, exposing certain parts of our bodies This restricts some activities from being performed while ...
javaPhobic's user avatar
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(Soft) Lay Survey of human natural history

I am looking for an introduction to the natural history of humans. I had originally thought Sapiens until I found out it is more a history and archeology book of dubious scientific accuracy. The Sorts ...
msm's user avatar
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Are there "old" neuron types in the neocortex?

"Old" may mean a neuron type that appeared early in the tree of life, and it may mean – going together – that it comes early in the lineage tree of neuronal cells, rooted in the fertilized ...
Hans-Peter Stricker's user avatar
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Which theory has more evidence, humans appeared in Africa 200,000 years ago, or there were already humans in Europe at least 210,000 years ago?

This theory Modern humans originated from a woman who lived in modern day Botswana says Every person alive today descended from a woman who lived in modern-day Botswana about 200,000 years ...
Pablo's user avatar
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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 ...
Shivani Sharma's user avatar
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45 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 ...
Jacob C.'s user avatar
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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 ...
Pediculus's user avatar
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53 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 ...
Genetica44's user avatar
1 vote
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259 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 ...
homonidae's user avatar
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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.
NigHterz's user avatar
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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 ...
Charles's user avatar
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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 ...
Himanshu P's user avatar
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Is there a specific book or textbook that lists all of the specific concepts of the theory of evolution in one place?

By specific concepts I mean those such as Zahavian signaling, the "sexy son" hypothesis, Mendel's peas, Lamarckism etc. Essentially I am looking for a book that helps visualize evolution in ...
Qwokker's user avatar
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Do the EDAR sinodont mutation affect brain size or intelligence?

I am reading on wikipedia that a certain mutation in the "Ectodysplasin A receptor" known as rs3827760 or 370A is responsible for the sinodont dentition pattern in East Asians as well as ...
Agerhell's user avatar
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0 votes
0 answers
43 views

Abilities used to survive against natural enemies: directional selection or frequency-dependent selection?

Regarding abilities used to survive predators and parasites, are they subjected more to directional selection or frequency-dependent selection? It's usually that host-parasite coevolution is ...
sterid's user avatar
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0 answers
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Is the human mouth more burn-resistant than other animals which don't eat cooked food?

I burnt my mouth on some hot pizza and it got me wondering if we have been eating cooked food long enough to have evolved a better resistance to oral burns than other species. Have there been any ...
Adam Kabbeke's user avatar
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122 views

Tribes outside humanity

All humans are a group with common ancestry but some humans distinct themselves into sub-groups by "distinctive ancestry" and tend to ask other humans "where are you originally from&...
al-harumi-jidan's user avatar
0 votes
0 answers
203 views

When did humans or their ancestors gain the instinct to take shelter?

I was going to ask if seeking shelter in a constructure dwelling or natural formation was instinctive to modern humans or if it is a learned sociatal behaviour. By shelter I mean seek routine ...
TafT's user avatar
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0 answers
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Biological & Evolutionary Reasons for Palm (Bi)Symmetry

The fingers of the human palm exhibit a (bi)symmetrical pattern with regards to their size, in the sense that the thumb and the pinky are almost the same size, and the same holds for the index and ...
Lucian's user avatar
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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 ...
Eli Rose's user avatar
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0 answers
54 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 ...
murmansk's user avatar
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-1 votes
1 answer
75 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 ...
tom's user avatar
  • 139
-2 votes
1 answer
330 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/...
Jfjdkksjsjk's user avatar
-4 votes
1 answer
103 views

On the Origin of Homo Sapiens

Paleoanthropologists are certain Homo sapiens originate from Africa. However where in Africa is still contested. Could you give the reasons why it is thought that Homo sapiens evolved in Eastern ...
David Okogbenin's user avatar