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7 untrue facts in which we believe
Until the end of the 16th century, everyone "knew" that the Sun and planets were formed around the Earth. Until the late 19th century, people believed that epidemic diseases such as cholera and plague, cause a poisonous mist filled with particles of rotting animals and plants. Until the early 20th century, the most common surgery was bloodletting, because we "knew" that the surplus of blood in the body contribute to the emergence of eccentric tendencies that are responsible for health disorders. Great.
But as absurd as it all may sound, our ancestors knew these "facts" with the same confidence as we do not doubt that the Earth is round, and ice cream with syrup and nuts well.
In an era of mind-boggling technologies we are steadfast in our knowledge. But in fact, many of the facts we mistakenly believe to be correct. Here are some of the most common misconceptions about our body and of nature, which could appear as the gossip or the result of misleading research. Whatever the reason, these facts are erroneous.
A walk in the cold with wet hair causes colds
"Put on your hat, and you'll get sick!" cries every caring mother when her offspring goes to winter Wonderland. But numerous studies on this subject prove that the probability of catching a cold from the frozen people no more than those who are not chilled. And there is no difference wet or dry hair. (But anyway, this advice will help to avoid a cold before it starts.)
Sugar makes children go mad and try to go with ума
Summarizing the results of 23 studies on the impact of sugar on children, the researchers came to this conclusion: it does not affect the behavior. Obviously, the idea of the existing relationship is so tightly ingrained in the minds of the people that influences the perception of the child's behavior. And here's the proof: in one experiment the mother said that her son drank the juice with high sugar content. And although the boy actually gave the drink without sugar, the mother reported significant activation of behavior.
A large part of body heat escapes through the head
In accordance with public opinion about 98 percent of body heat is lost through the head, and why you need to wear a hat in the cold. Actually it is not so. The amount of heat emitted by any part of the body depends on surface area. On a cold day you will lose more heat through an exposed leg or arm than a head.
Because of the crunch of the knee appears arthritis
Seems reasonable, but it's also true. Arthritis appears due to the crunch of his knees. There is no evidence of such a relationship, and a number of studies among people who are used to crunching knee joints and never did, have not revealed increase in cases of arthritis. In the medical literature shows cases when the crunch of her knees began to cause damage to the ligaments around the joint or displacement of the tendons, but not arthritis.
Before exercise you need растянуться
Stretching before exercise – the key to a good performance and no damages, and therefore everything is stretched. But the researchers found that in reality such training slows the person. According to scientists stretching before Jogging by 5 percent reduces the effectiveness. Italian experts, who studied cyclists confirmed that stretching reduces the productivity of the athlete. Moreover, there are no sound scientific evidence that pre-stretching reduces the risk of injury.
Cholesterol in eggs has a negative effect on the heart
The perceived relationship between dietary cholesterol and risk of coronary heart disease originates from the recommendations of nutritionists in the 1960-ies. Scientific studies, in addition to experiments on animals when they were fed food that saturated fat and cholesterol, which greatly exceeded the normal dose. Since then, study after study has prove that dietary cholesterol (contained in food) has no negative impact on increasing cholesterol levels in the body. In this case, the crucial role played by saturated fat consumption. So, eat eggs, not chops.
One year for humans is seven years for dogs
Age your three-year of the dog according to human calculation. corresponds to the 21 year? Experts don't think so. In accordance with the General opinion of dogs Mature faster than humans, and reach the development level of 21 for only two years and then aging slows to four years in one year. Dog experts suggest this method of counting the age of your pet in relation to a person: subtract two from the age, multiply the remainder by four and add 21.
Source: /users/104
But as absurd as it all may sound, our ancestors knew these "facts" with the same confidence as we do not doubt that the Earth is round, and ice cream with syrup and nuts well.
In an era of mind-boggling technologies we are steadfast in our knowledge. But in fact, many of the facts we mistakenly believe to be correct. Here are some of the most common misconceptions about our body and of nature, which could appear as the gossip or the result of misleading research. Whatever the reason, these facts are erroneous.
A walk in the cold with wet hair causes colds
"Put on your hat, and you'll get sick!" cries every caring mother when her offspring goes to winter Wonderland. But numerous studies on this subject prove that the probability of catching a cold from the frozen people no more than those who are not chilled. And there is no difference wet or dry hair. (But anyway, this advice will help to avoid a cold before it starts.)
Sugar makes children go mad and try to go with ума
Summarizing the results of 23 studies on the impact of sugar on children, the researchers came to this conclusion: it does not affect the behavior. Obviously, the idea of the existing relationship is so tightly ingrained in the minds of the people that influences the perception of the child's behavior. And here's the proof: in one experiment the mother said that her son drank the juice with high sugar content. And although the boy actually gave the drink without sugar, the mother reported significant activation of behavior.
A large part of body heat escapes through the head
In accordance with public opinion about 98 percent of body heat is lost through the head, and why you need to wear a hat in the cold. Actually it is not so. The amount of heat emitted by any part of the body depends on surface area. On a cold day you will lose more heat through an exposed leg or arm than a head.
Because of the crunch of the knee appears arthritis
Seems reasonable, but it's also true. Arthritis appears due to the crunch of his knees. There is no evidence of such a relationship, and a number of studies among people who are used to crunching knee joints and never did, have not revealed increase in cases of arthritis. In the medical literature shows cases when the crunch of her knees began to cause damage to the ligaments around the joint or displacement of the tendons, but not arthritis.
Before exercise you need растянуться
Stretching before exercise – the key to a good performance and no damages, and therefore everything is stretched. But the researchers found that in reality such training slows the person. According to scientists stretching before Jogging by 5 percent reduces the effectiveness. Italian experts, who studied cyclists confirmed that stretching reduces the productivity of the athlete. Moreover, there are no sound scientific evidence that pre-stretching reduces the risk of injury.
Cholesterol in eggs has a negative effect on the heart
The perceived relationship between dietary cholesterol and risk of coronary heart disease originates from the recommendations of nutritionists in the 1960-ies. Scientific studies, in addition to experiments on animals when they were fed food that saturated fat and cholesterol, which greatly exceeded the normal dose. Since then, study after study has prove that dietary cholesterol (contained in food) has no negative impact on increasing cholesterol levels in the body. In this case, the crucial role played by saturated fat consumption. So, eat eggs, not chops.
One year for humans is seven years for dogs
Age your three-year of the dog according to human calculation. corresponds to the 21 year? Experts don't think so. In accordance with the General opinion of dogs Mature faster than humans, and reach the development level of 21 for only two years and then aging slows to four years in one year. Dog experts suggest this method of counting the age of your pet in relation to a person: subtract two from the age, multiply the remainder by four and add 21.
Source: /users/104
