In Norway, a repaired arrow from an unlucky hunter was found that had melted from under the ice.

Archaeologists have discovered in Norway the shaft of a medieval arrow, the broken shank of which was repaired by a hunter using sinew. However, apparently, then he was unsuccessful again and his shot missed the target, burying the arrow for several centuries under snow and ice. As the Secrets of the Ice project team reports… Continue reading In Norway, a repaired arrow from an unlucky hunter was found that had melted from under the ice.

Spectrometer based on LEGO constructor will make studying physics cheaper

German physics teachers made a universal spectrometer in the Czerny-Turner scheme using LEGO constructors and scrap materials. The authors showed that it can be used to study the spectra of atomic emission, transmission, reflection and fluorescence. Reconfiguring the device for different tasks takes a few minutes, and the total cost of the device does not… Continue reading Spectrometer based on LEGO constructor will make studying physics cheaper

Hormone injections improve cognitive performance in Down syndrome

Injections of a hormone from the hypothalamus, which is responsible for the development of the genital organs and is commonly used to treat infertility, have been able to improve cognitive performance in people with Down syndrome. This was discovered by European scientists who conducted a study on seven young men. After six months of living… Continue reading Hormone injections improve cognitive performance in Down syndrome

The algorithm determined the mouse's pain level based on its muzzle expression

American scientists have developed a cloud platform that can assess the severity of pain in black laboratory mice. She analyzes the expression of the animal's face – the position of its nose, ears, whiskers and the degree of squinting of the eyes. Previously, researchers coped with this task manually, but, as the results show, the… Continue reading The algorithm determined the mouse's pain level based on its muzzle expression

Ingenuity survived the Martian winter

The Martian drone Ingenuity made its first full flight after two months of inactivity, thereby confirming that it successfully survived the coldest part of the Martian winter. In the near future, the drone will receive a software update and will go to explore the delta of the ancient river in the Jezero crater. reported on… Continue reading Ingenuity survived the Martian winter

Engineers have learned to touch the touch screen without contact

Engineers from China and Germany have created the GhostTouch device, which allows contactless control of capacitive touch screens, taking advantage of their design features and susceptibility to electromagnetic interference. The device can accurately simulate taps and swipes in different directions on the screens of many popular smartphones without touching them. Despite the fact that the… Continue reading Engineers have learned to touch the touch screen without contact

The smell of a woman prevented an antidepressant from calming mice

Scientists from the USA and Cyprus have found that the gender of the experimenter can influence the results of medical experiments on mice. It turned out that the smell of men causes stress in animals and a desire to escape from its source. But if a man injects a mouse with an antidepressant, its effect… Continue reading The smell of a woman prevented an antidepressant from calming mice

Electrical brain stimulation stopped overeating in two patients

Electrical stimulation of the brain has proven to be an effective treatment against overeating and obesity. This was discovered by American scientists who worked with two patients with compulsive overeating disorder. They activated the area of ​​the brain that is responsible for food cravings with an electric current – and as a result, the women… Continue reading Electrical brain stimulation stopped overeating in two patients

Watering with ethyl alcohol protected the rhizome from drought

Japanese geneticists have proposed increasing the drought resistance of plants using ethanol. They watered Tal's rhizomes (Arabidopsis thaliana) with a weak alcohol solution for three days and showed that this helped the plants survive the subsequent three-week drought. In response to alcohol, the plant activates the synthesis of the stress phytohormone, abscisic acid, which helps… Continue reading Watering with ethyl alcohol protected the rhizome from drought

Chinese scientists have deprived mice of a chromosome. And then another one

Chinese scientists have tested a new method of genome engineering: they have learned to stitch mouse chromosomes together. It turned out that if the chromosomes are not very large, then it is easy to glue them together and get a mouse with an odd number of chromosomes. Such animals can grow up healthy and fertile… Continue reading Chinese scientists have deprived mice of a chromosome. And then another one