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9

Yes, it can, but it is extremely rare. ... nosebleeds are rarely fatal, accounting for only 4 of the 2.4 million deaths in the U.S. in 1999 [1]. The main issue is that epistaxis can be a sign of potentially fatal diseases: The instances in which nosebleed is potentially fatal are those in which there is a history of recent head injury, severe ...


6

Long story short, the astronaut probably wouldn't make it, and would first loose consciousness then suffocate. There is a lot of myth and hollywood dramatization regarding this kind of thing. Here are some: You will explode. This is just ridiculous. The skin is air tight (relatively speaking). It is also very elastic and can pull and bend quite a great ...


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 ...


5

Any injury, that results in external bleeding can lead to death, since it is a breach in the body's defenses and an entry point for pathogens. Explanation: When you have nose bleeding the blood must be coming from somewhere. Usually from inside your body. That means there is a hole in your body which is big enough for blood to stream out. That in return ...


3

There are multiple levels of memory, some of which would die immediately, some of which would take some time. So the answer is: it depends; some immediately, some only very slowly. At the highest level, the current neuronal firing state of the brain encodes memory on a very short scale - working memory. The memory held on this level does not have a clear ...


3

Yes it can but it is very rare. Most often when you get a nosebleed it is either a vein or capillary that ruptures. However in some cases it is arterial bleeding which is always an emergency. I have honestly noticed when I have nosebleeds often each one is worse than the previous with some having a lot of bleeding but still no gushing from an artery. ...


3

Yes. Usually only in the case of someone with hemophilia (no blood clotting) but it could theoretically occur with any serious uncontrolled nosebleed. Since blood in the stomach tends to cause vomiting, you could also lead to a scenario where someone who was uncomfortable with blood would pass out due to being scared of the blood and then aspirate (puke and ...


3

For car crashes, it's a mixed bag: Better Better Worse Worse Basically, it looks like, if wearing a seat belt, slightly overweight is more likely to survive a car crash, but if no seat belts are worn they are at a disadvantage; the very obese are always more likely to die, however. Also, some of this was found only for males, not females.


3

I think the key is "his fragrant corpse." When an animal dies and begins to rot, a number of quite smelly chemicals are given off, including putrescine and cadaverine. Crows and other carrion birds like vultures are probably very sensitive to these compounds, rather like sharks are to the smell of blood.


2

Carrion birds, such as crows and vultures, eat dead animals. As a whole, it's possible that they detect carrion by the smell or visually. Crows specifically are omnivorous and predatory in addition to being carrion scavengers. I suspect that they will try to eat anything that doesn't fight back, especially if they are hungry enough and there is exposed ...


2

Alain Bombard He is a french biologist who voluntarily tested how many days a man can survive drinking seawater and how? Biologist point of view Sea contains ~3.5% of salt$^1$. Our kidney separates the waste from water and excrete them in urine provided the salt content is less than ~2%.$^2$ So, it will take the water already present in the body. ...


2

According to Wikipedia Electric shock, the Magnitude of electric shock to a body is mainly due to current as well as voltage. Various factor of the environment will also play a major role in damaging the body while under contact. The following quote explains it: The minimum current a human can feel depends on the current type (AC or DC) and frequency. A ...


2

The issue I suspect you are struggling with is the anthropomorphization of the evolutionary process. Evolution is an optimization process driven by random mechanisms...i.e. there is often not a "reason" for why certain things are the way they are. Evolution is not a conscious "designer" that produces things with a specific goal in mind...it simply "picks" ...


1

Dimethyltryptamine have been identified as normal constituents of human blood, urine,cerebrospinal fluid.Dimethyltryptamine is an N-methylated indoleamine derivative, a serotonergic hallucinogen.It apparently acts as an agonist at some types of serotonin receptors and an antagonist at others.DMT is traditionally associated with indigenous Amazonian people, ...


1

Once the thermodynamically irreversible processes we call brain-death have occurred both memories and the machinery to retrieve them are lost. This is not an answer but a cavil with the premise of the question. Challenges that do not destroy the brain itself are different from those that do. In particular there may be a big difference between hypoxia ...


1

Perhaps the best type of study to examine the role of genes (DNA) in human aging are twin studies. They have either: the same DNA (monozygotic, one egg, "identical" twins (MZ) ) or similar DNA (dizygotic twins, two eggs (DZ) ) and are perhaps exposed the same, or different environments. I won't repeat the information in the link, above, but studies of ...


1

This article deals with the issue in detail.


1

Yes it can. Usually this is through an increased rate of suicide or the inability to look after yourself due to the level of pain you are in. It is so common that there are so many medical departments that have the sole job of pain management. Pain itself is not designed to kill you (in fact the very opposite as highlighted excellently by Cuana), but as ...


1

1 year and 17 days only on water and electrolytes. Actually, he went water only for about 75 days (read that elsewhere, can't remember) and then they supplemented his water only diet with electrolytes. He's done it under medical supervision and gained 7 KG in 5 years after the fast. So the weight does stay off (obviously, if you go and stay into a healthier ...


1

You can remember this easily as the rule of threes: You can survive: 3 minutes without air. (death by asphyxiation) 3 hours without shelter (death by hypothermia, heatstroke). 3 days without water. (death by dehydration) 3 weeks without food. (death by starvation) Going beyond those guidelines will generally do you permanent damage. Further reading: ...



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