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7

The idea that we only love our family according to biology is not true, but its also not clear what people mean by the word 'love'. There are many ways to interpret that word! Hope this doesn't totally suck any romantic ideas out of you, but metaphysical concepts of love and romantic ideas of love are not always relevant when you talk about biology. A ...


7

Disclaimer: I'm an infectious disease modeler, and generally pretty skeptical of "We modeled X like an outbreak!" claims, because many are just an exercise in curve fitting. Given that, the answer is both "Yes" and "No". "No": Murder as an act really isn't transmissible, and if its not transmissible, it can't be modeled as an infectious disease. "Yes": It ...


7

"How come most animals never seem to evolve over millenia?" I guess the word "seem" in your question should not be disregarded. You seem to assume that cockroaches (or most animals as you say) did not change much the last tens or hundreds thousands of years. But what do you know about that? Have you actually reviewed many research that estimate the rate of ...


6

In the world of physics, you can distinguish between random motion (e.g. thermal Brownian walk) and directed motion (called ballistic: think of a cannon ball) by studying the mean square displacement of the object: you'll be able to fit this displacement as a function of time by a linear law if it is random, and by a quadratic one if it is directed. ...


6

Flies use any object they can find as a landmark. The flies patrol well-defined airspaces underneath landmarks like lampshades. ... Male flies approach a landmark from below and, in the absence of other flies, settle to patrol an airspace close to the landmark. A second male approaching the same landmark chases, or is chased away by, the patrolling fly ...


5

You will be hard-pressed to find any scientific data on this question. Psychology in humans is already a difficult study, at times failing to demonstrate results with real scientific rigor. When studying animal psychology, you face another substantial barrier - language. Although some primates have been taught to communicate with sign language, the best of ...


4

That is a threat face. Barbary macaque threat faces often appear with a brow raise, lowered head, and an o-shaped mouth, sometimes with and sometimes without a vocalization. Given the context you described it is not surprising the girl received a threat. *Based on personal research experience


4

It looks like it is trying too threat. Source: Individual differences in scanpaths correspond with serotonin transporter genotype and behavioral phenotype in rhesus monkeys (Macaca mulatta)


3

As the previous answers clarify, all organisms have heritable traits that may be manipulated through selective breeding. It is the pragmatics that can be prohibitively challenging. From an (zoo)archaeological point of view, few animals have actually been domesticated, and only recently in our species' history. The dog is an unusual case, perhaps domesticated ...


3

is this guess proven or affirmed by science? It is a debated topic. Such altruistic behaviors (toward non-kin) are extremely rare evolutionarily, with some theorists even proposing that they are uniquely human [1]. Experimental evidence indicates that human altruism is a powerful force and is unique in the animal world. [...] Current gene-based ...


3

This is a hard question to respond to. Many things might make someone grumpy. There are also individual temperaments, making grumpy hard to quantify - a Grumpy to one person might barely be a blip on another individual's scale. Hormones like cortisol reflect stress, and can make people in general irritable, but I doubt any one combination of hormones ...


3

It is called a frisson, and actually, there has been a study about it, available here. The frisson is kind of the same you get from cold weather, fear, or... well, other things not suitable to discuss if not knowing how old people reading this might be. Actually, they found that this works best if you include familiarity. In their case, asking study ...


2

This seems to be rather impossible to answer! Very fundamental laws of nature are rather found in physics, mathematics or philosophy than in biology. The theory of evolution is generally considered as a field that brings light to the whole science of biology. T. Dobzhanski famously said: "Nothing in Biology Makes Sense Except in the Light of Evolution" So I ...


2

Shigeta brings up the question of altruism which Richard Dawkins famously explains in the context of evolution in The Selfish Gene. This is probably the easiest way to translate feelings of love into biology. EO Wilson has also addressed the idea of kinship and altruism, providing arguments on both sides of the issue at this point. He was an early champion ...


2

Of course. As you quoted from Wikipedia: It is commonly associated with tiredness, stress, overwork, lack of stimulation and boredom. Insomniacs, because they can't get a good sleep, are more tired and stressed than the others.


2

All phenotypic traits have some part of the variance which is explained by the environment and some part that is explained by the genes. The heritability is then defined as: $$H_N = \frac{V_{genetic}}{V_{phenotype}} = \frac{V_{genetic}}{V_{genetic}+V_{environment}+V_{interaction. gene.environment}}$$ where $V_{genetic}$ is the Variance in phenotypic ...


2

Music and Emotions The most difficult problem in answering the question of how music creates emotions is likely to be the fact that assignments of musical elements and emotions can never be defined clearly. The solution of this problem is the Theory of Musical Equilibration. It says that music can't convey any emotion at all, but merely volitional ...


2

As everybody, I don't fully understand your question. Can you please add your definition of domestication? Would you consider domestication as soon as human can select for heritable traits? If yes, then the question may be split in two: Do all animal populations have heritable traits? Yes! But Depending on what kind of traits you want to consider no ...


2

I understand the question as "can you get any animal to have heritable traits selected by humans?" This definition of domestication implies that a population of animals can be bred for a sufficiently long period of time, so that humans can select hereditary traits that fit their needs. Humans could provide selective pressure that creates a new variety with ...


1

Suggested Reads: Evolutionary Psychology By Lance Workman, Will Reader Evolution of Human Behavior: Primate Models edited by Warren G. Kinzey Social Behaviour of Children: A Cross Cultural Assessment By Ralph E. S. Tanner


1

This may shed light on why the teenagers response to dopamine changes. Quote from reuniting website There's much still to learn, but it looks like a number of reward circuitry events occur after climax that have the potential to desensitize us for a time. First, androgen receptors decline after ejaculation, and take up to seven days to normalize. ...


1

aside from the latter option, why haven't any differences in animals'(except humans) markup, morphology, intelligence, DNA, behavior, or any habits changed over thousands or (possibly millions) of years? What evidence is leading you to that conclusion? For horses, example. (From the talkorigins article): The first equid was Hyracotherium, a ...


1

You might want to look at the Danish Data archive: http://www.sa.dk/content/us/about_us/danish_data_archive I have never used their data and I don't know what barriers there might be to accessing it, but the impression I got at a talk by Soren Brunak (http://ctbr.hunter.cuny.edu/Brunak), was that this was one of the most complete databases for studying ...


1

I'm going to hazard turning my comment into an answer.... Even if the answer might be no, you know this is a good thought and there is something there... lets dig a little. Eusociality in evolutionary biology is by many like Dawkins and Wilson pointing to the evolution of sterile castes of animals, which are very closely related to the breeding caste. ...


1

The question of homosexuality and its role in nepotism is interesting. According to this wiki article, less than 10% of the population is homosexual. If you consider that homosexuality makes human eusocial because homosexual do not reproduce but help their brothers and sisters to reproduce, then you would have to consider any species where a few percentage ...


1

This is a tricky question. First, evolutions tends to be slow, alsthough there have been recent examples of very fast evolution as well. So for most evolutionary processes we are not long enough present to see them either happening or see the outcome. Therefore its also hard to say that no evolution is happening - see your cockroach example. How do you know ...


1

I cannot find any definite articles on why there would be a reason for this behaviour other than the same ones that you have mentioned in your article. It could be because it wants to mark its territory or the dog wants to hide its scent. One point that I would also like to add is force of habit. As Charles Darwin (the father of evolutionary biology) had ...



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