The bodies of modern people find disappeared during the evolution of the bone
In the course of evolution, some parts of the human body have become useless, and even began to fade. A striking example - the bone called Fabella, located behind the knee, and which had a very small size. In modern humans it is extremely rare, so scientists are not even interested in its function - it is known only that it often has in people suffering from osteoarthritis. Over the past hundred years, it has, for some reason, began to appear more frequently in the skeletons of people, because of what the question is - what has caused her return?
The discovery was made by researchers from Imperial College London, studied the anatomy of people on the basis of 58 scientific works of scientists from different countries. It was found that in 1875, this small bone occurs in 17% of the people, and by 2018, its prevalence has increased in 3, 5 times - she was found at the feet of 39% of the Earth's inhabitants.
It is classified as a sesamoid bone - usually they are located in the interior of the tendon and adjacent to other bones. Scientists believe that it, like other bones, can be used to reduce friction in the tendons. At the same time, a huge number of people do very well without it, so scientists are wondering - what has caused its active return?
One hypothesis states that its revival may be related to improving the diet of modern people - compared with residents of previous centuries, modern humans began to eat, become the higher the better growth and gained weight. This has resulted in an increased load on the knee area, which is why some people and could grow Fabella.
Perhaps this bone never disappeared - due to its tiny size, the autopsy X-rays and simply could not find it. Now, however, researchers have tomography machines that are easy to detect even the smallest objects.
To understand this question, the researchers intend to collect more data and to divide them by age, location and other parameters of people. According to Professor Michael Berthauma, bone can not really have an important function, and cause painful arthritis. If she really is a source of problems, surgeons can remove it to eliminate them.
On the topic of parts of the human body that have lost the need for the process of evolution, be sure to check out our special material. It lists the parts of the body, which still has a lot of people, but do not bring any benefit.
Do you think there has Fabella any good or harm? His bold assumptions share in the comments or in our Telegram-chat.