Interesting questions to which few people know the answer, but we will share information and answers with you.
✏ What happens if you swallow a needle?
It is impossible to predict the end result of swallowing a needle with 100% certainty. But there are several scenarios according to which events usually develop. In the most dangerous case, the swallowed needle will enter the lung or heart and make a hole there, which will lead to death without surgery. Of course, death will not come instantly (although in some cases everything happens extremely quickly - within a few hours), but the inflammation provoked by the needle will ultimately lead to either the loss of part of the lung (with a delayed operation) or death (if without doctors).
The location of the needle inside the body is detected using an X-ray. And if a lung or heart is damaged, then immediate intervention of surgeons is needed. If the needle reaches the stomach, then the probability of a successful natural outcome (in the literal sense) is 80%. That is, the needle will most likely come out with feces. True, the remaining 20% are forced in most cases to perform an operation to remove excess metal from the body.
✏ What happens if you manage to eat three tablespoons of salt?
If we consider your question exclusively from a theoretical point of view, then according to the opinion of most doctors, the conditionally lethal dose of table salt, consumed at one time, is 250 grams.
Now let's try to calculate based on the known:
One teaspoon can contain 7 to 10 grams of edible salt.
In one tablespoon - from 25 to 35 grams.
Thus, the maximum amount of salt eaten from three tablespoons will be 105 grams.
This dose is far from lethal, however, it can also first cause a strong thirst, and then terrible swelling of the whole body due to the fact that salt retains fluid in the body very well ...
✏ Why is there green blood?
The red color of the blood comes from hemoglobin, the oxygen-carrying pigment. But many invertebrates do not use hemoglobin to transport oxygen, but other pigments, the "working part" of which are ions of different metals. In particular, the blood of many mollusks, arthropods and some other animals contains hemocyanin, a pigment with a copper ion. Most often, this compound makes the blood blue, and sometimes (for example, in cuttlefish) bluish-green. One of the species of frogs found in Cambodia also has green blood.
✏ Why can't you sleep in front of a mirror?
Mirrors can cause a whole series of unmotivated problems in a person's life, both in personal life and with health. This is because refraction, reflection and distortion of the information received occurs in the mirror, especially for old mirrors. And as for antique mirrors, it is generally better not to hang them in the bedroom, they have accumulated so much information during their existence that it will only have a negative impact and there will be one harm from them.
If we move away from the magical influence, then at the level of physiology there are also explanations of why it is impossible to sleep in front of the mirror. In a half-asleep state, any movement out of line of sight is subconsciously perceived as a signal of danger, and, fixing a reflection in the mirror, the brain "begins" to get nervous and panic. In addition, the mirror in the bedroom disturbs the intimate atmosphere, it creates the illusion that there is someone else in the bedroom.
✏ Why do men get erections in the morning?
One theory is that morning erection occurs as a result of an increase in the amount of testosterone in the blood. The male hormone reaches its maximum concentration between 5 and 9 am, forcing the penis to get up.
✏ What will happen to a man on Mars without a spacesuit?
Extremely rarefied atmosphere, with a pressure of 640 Pa [approximately 1/150 of the Earth]. Water in such conditions boils at a temperature of about +0.5 Celsius, which is much lower than the temperature of a human body. That is, without a hermetically sealed rigid spacesuit, similar to the lunar one, a man on Mars will instantly boil his blood, it can be prevented by arterial / venous pressure in the human circulatory system). But the release of some gases from the blood will be almost guaranteed, causing circulatory disorders, embolism and symptoms close to decompression sickness. It is incredibly painful and dangerous to health, and in every practical sense, atmospheric pressure below about 6.3 kPa is detrimental to humans]
✏ Why does the déja vu effect occur?
The state of déjà vu is like re-reading a long-read book or watching a movie that you have watched before but have completely forgotten what they are about. You cannot remember what will happen in the next moment, but as the events unfold, you realize that you have seen these few minutes in detail as a reaction to several successive events. Déjà vu is a fairly common phenomenon; studies show that up to 97% of healthy people have experienced this condition at least once in their life, and patients with epilepsy are much more likely. However, it cannot be induced artificially and each individual person rarely experiences it. For this reason, scientific research on déjà vu is difficult.
✏ Why do humans have more than 200 teeth?
A unique operation was carried out in the Indian city of Mumbai. Dentists removed 232 teeth from 17-year-old Ashik Hawaii, which grew in his mouth as a result of a rare disease. Dentists say this is arguably the most difficult procedure of its kind ever performed on the planet, according to the Guardian.
The young man went to the doctors with a complaint of a tumor on the right side of the lower jaw. After a thorough examination, doctors diagnosed Ashik Hawaii with a rare disease called odontoma (benign bone formation), which was in an advanced stage. This ailment is a benign tumor of dense consistency that forms on the teeth. Thus, more than 200 "extra" teeth appeared in the teenager's mouth.