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11

Snopes.com gives a discussion of possible issues with the original experiment. Evaporation or bowel or body movements for instance. I think the biggest complaint about the experiment is that it has not been reproducible and that the original experiment was flawed. MacDougall only took six measurements and he threw two of them out in his original work. ...


8

Nope, you wouldn't die instantly. While explosive decompression has never been tested on humans (for obvious reasons), the dangers of a vacuum have mostly to do with the pressure differential between your body and the now pressure-less void around you. The most fragile parts of the biological system would be the lungs and ears, and the instantaneous ...


7

About 52 to 74 days according to hunger strike wiki page. This wiki page bases its data on 8 persons who died due to hunger strike: Days survived by each person: 66, 59, 61, 61, 61, 46, 71, 73, 62, 60.


5

Although both involve DNA fragmentation, the pattern produced is very different. During apoptosis, DNA fragmentation is done in a regular, controlled pattern, which if run on a gel produces a characteristic "ladder" pattern. Necrosis, on the other hand, is a more stochastic process, and will produce a smear. This details the difference rather nicely, ...


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

This would vary a LOT depending on the amount of stored fat, previous diet, the weather and even the water drunk. Weeks though there is a good chance that a loss of electrolytes can cause health problems. (that's why I mention the water you drink, because many bottled water brands and wells have a bit of salt in them.) Its hard to say from anecdotal ...


4

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 ...


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

One other important event that can kill the person is that the atmospheric pressure on Mars surface is less than one percent that of earth at ground level. Suddden exposure to extremely low atmospheric pressure will immediately release dissloved gases within blood and and other body fluids as bubbles and the individual is likely to get a very severe form of ...


3

This is very dependent on the organism within each of the groups you mention. While for the most part, archea are the extremophiles and have the ability to withstand many extreme conditions, nutrient limitation survival greatly varies. I think you could easily find organisms in each group that could withstand nutrient limitation well. A good example would ...


2

Less then a minute breathing in the atmosphere (and a very painful death). Mars' atmosphere is >95% CO2 with only trivial O2. These are atmospheric conditions similar to those used to euthanize laboratory animals. He probably wouldn't even make it 200 meters before suffocating.


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

I very much doubt it. You may however die from whatever's causing the pain. The reason you feel pain is so you stop doing whatever is causing the pain. Hence someone knows not to touch a hot fire because it is painful. But the pain itself is not actually the danger - it's the fire burning away skin. So pain is actually a good thing, a survival mechanism. So ...


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

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

Some theories: Dead bodies died of something. In the earliest ages these were generally infection. Burying them protected us from something that could kill us too. This is also why we would be evolutionarily programmed against cannibalism They make great fertiliser. Burying waste, dead animals etc resulted in the growth of plants etc which not only food we ...


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: ...


1

Coming up with the exact number is likely to be very difficult but i would put it in the range of 1-2 minutes to impossible. Let's ignore the lack of oxygen and assume you could hold your breath long enough to reach the safe haven. The extreme cold would easily drop your core temperature to the realm of severe hypothermia within minutes. If that doesn't ...


1

My answer isn't researched; it is speculative. I interpret metabolic processes as anabolic or catabolic processes. I assert that only anaerobic processes can continue for a long time after vegetative death (the epithelia could house a counter-example of a post-mortem process, but I can't think of one), and I speculate that only catabolic processes are ...



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