Cretaceous herbivorous mammals gnawed the corpse of a predator

The ancient mammals from the group of polytuberculates, which resembled rodents, fed on plants, but did not refuse invertebrates – and sometimes even carrion. A Russian paleontologist described another case of eating carrion among representatives of this group. In an article published in the magazine “Reports of the Russian Academy of Sciences. Earth Sciences”the scientist… Continue reading Cretaceous herbivorous mammals gnawed the corpse of a predator

Reduced math anxiety was associated with faith in teachers

Canadian scientists conducted a major study of math anxiety, which included more than a million students from 65 countries. Researchers have shown that there are differences in how math anxiety can be associated with math achievement: individual anxiety had a negative impact on math achievement in children from all countries studied, while average levels of… Continue reading Reduced math anxiety was associated with faith in teachers

The Germans have created light-controlled microdrones the size of a third of a red blood cell.

Engineers from the University of Würzburg have created microscopic drones weighing about 2 picograms and measuring about 2 micrometers that can move when exposed to light. They use plasmonic nanoantennas made of several gold nanorods combined into groups as motors. Light falling on them with a certain wavelength and polarization leads to thrust due to… Continue reading The Germans have created light-controlled microdrones the size of a third of a red blood cell.