British scientists have revealed that the brain's immune cells are updated only six times during the human lifetime. According to the experts, this discovery will allow them to cope with neurodegenerative diseases, "Pravda.RU" writes. In the center of the study were phagocytes which absorb the dead or damaged neurons, as well as fight with foreign elements.

Scientists know that stress can lead to the development of heart disease and stroke. But only now they understand exactly how it happens, The Times of India reports. It turns out that stress causes increased activity in the amygdala of the brain. This resulted in enhanced development of bone marrow leukocytes and the accumulation of plaque in blood vessels

Women are usually blamed as a cause of infertility mostly due to their natural ability to give birth. However, according to the latest global statistics, the proportion of male guilt in this problem is more significant and ranges from 45 to 70% of all cases of impossibility of conception. Whereas the female factor is more modest and it makes 25-50%, and infertility associated with common problems of both sexes is 10-25%.

The scientists of the University of Copenhagen and the University of Bradford believe that tattoos are harmful. Concerns are caused by the paints that are used for tattooing. These paints are carcinogenic and can provoke not only cancer but also other diseases, "Moskovskiy Komsomolec" writes. The paints contain mercury (red shades) and cobalt (blue, green). The analysis of 21 popular types of paints has revealed toxic substances in 13 of them.

The inflammation associated with gout often causes a severe pain. But a recent study has allowed to reveal an unexpected solution of this problem. It turns out that a high-fiber diet helps to lower inflammation levels and alleviate pain, Zee News reports.

It was found that in case when a person just hears any information about some type of catastrophe from another person, the brain information processing scheme is changed and the risk of post-traumatic stress disorders is increased, DNA India reports.

Specialists have almost reached the victory over the aging. Recently, the medicinal product has been created. Thank to this medicinal product older mice began to run faster and live longer. Also in rodents new hair began to grow. The remedy removed the cells that have been accumulated in the rodents’ skin in the process of aging, The Daily Mail reports.

140 children aged 3 to 11 years participated in the study conducted by the scientists of Monell Center. The volunteers were given three seconds to smell one of the three scents (rose, fish or neutral). After that, two photos of the same person were demonstrated, Psych Central reports.

The scientists of the University of Tromso have found out that women tolerate the heart attack pain better than men.

Specialists from the University of Iowa have found a new potential biomarker of dementia - autotaxin. Previous studies have shown that people with obesity have increased autotaxin levels in the brain.