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.
British climatologists studied the distribution of smoke in the stratosphere after bushfires in Australia in 2019–2020. They found that black carbon particles in the smoke increased the average temperature in the lower stratosphere by 0.7 degrees worldwide, with temperatures rising by three degrees over Australia. Additionally, the reaction of smoke and ozone has caused the… Continue reading Bushfire smoke raised temperatures in Australia by three degrees
Physicists from 13 countries presented the results of a study of the relative frequency of production of short-range two-nucleon correlations in the lightest mirror nuclei containing three nucleons. The data were obtained for a certain kinematic range during electron scattering by nuclei. The collaboration found that in light nuclei, neutron-proton pairs are formed approximately twice… Continue reading Mirror light nuclei differed from heavy ones in the frequency of nucleon pair production
Chemical experts from the US Food and Drug Administration (FDA) analyzed 85 milk replacers from eight different plants and found that most of them were low in phosphorus, magnesium, zinc and selenium – micronutrients of which cow's milk is an important source. The exception was drinks made from legumes – in some of these minerals… Continue reading Plant milk is inferior to cow milk in terms of micronutrient content
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
The Perseverance rover discovered volcanic rocks in the Jezero Crater. This contradicts the expectations of scientists who expected to see sedimentary deposits. Their absence may indicate that the lake at this place disappeared too quickly, and sedimentary rocks did not have time to form. Two articles (1 and 2) devoted to the results of Perseverance’s… Continue reading Perseverance discovered volcanic rocks instead of sedimentary ones in Jezero Crater
American physicists studied the natural vibrations of water droplets on hydrophobic substrates in microgravity conditions. To do this, they sent the necessary materials and equipment to the ISS. By filming the vibrations of the drops on camera, the scientists were able to confirm that their previously developed theory of vibrations of free drops works well.… Continue reading Oscillations of water droplets on the ISS improve understanding of wetting
After a night of poor sleep or no sleep at all, people consider themselves less willing to help others, American scientists found in laboratory experiments and studying the sleep experience of people at home. It also found that after daylight saving time, when people potentially lose an hour of sleep, they donate less than they… Continue reading People didn't want to help others after a sleepless night and daylight saving time.
Physicists and biologists from France and the USA have modeled the movement of plankton, which uses vortices in the water to move faster, riding them like surfers on waves. To do this, scientists derived the equation of motion of plankton, which measures the local flow gradient and changes its direction so as to swim upward… Continue reading Simulated plankton surfed on turbulence and accelerated twice
Drivers spend significantly less time operating vehicle functions, such as changing the radio station or selecting the climate control temperature, when they do so using mechanical buttons and knobs rather than a touchscreen. These are the conclusions reached by the Swedish publication Vi Bilägare, which conducted a study with 12 machines and 4 common tasks.… Continue reading The Swedes showed the superiority of buttons and knobs over touch controls in a car