Wooden sickles more than 7,000 years old found in Italy

Archaeologists presented the results of a study of three wooden sickles discovered during underwater excavations at the Early Neolithic site of La Marmotta in Italy. It turned out that these tools were made more than seven thousand years ago from oak and wood belonging to the rose family. Ancient people used resin from pine trees… Continue reading Wooden sickles more than 7,000 years old found in Italy

Physicists have proven the importance of the mesoscale for quantum phase transitions

Low-temperature phase transitions in ferromagnets are characterized by destruction of the domain structure. In an article in Nature physicists write that for a theoretical description of the dynamics of such transitions, it is necessary to take into account not only microscopic, but also mesoscale symmetry. This discovery indicates the possibility of the existence of non-classical… Continue reading Physicists have proven the importance of the mesoscale for quantum phase transitions

Hamsters from the wet slopes of the Andes turned out to be larger than their relatives from the arid plains

Zoologists from Argentina, the USA and Chile have discovered that plateau hamsters Abrothrix hirta from the wet western slopes of the Andes are larger than relatives that inhabit the arid plains east of this mountain range. This pattern is explained by the fact that the abundance of precipitation has a positive effect on the growth… Continue reading Hamsters from the wet slopes of the Andes turned out to be larger than their relatives from the arid plains

Traces of cockroach ootheca found in Jomon period ceramics

Archaeologists have examined 4,000- to 5,300-year-old Jomon period pottery discovered in Japan. In five artifacts they found traces of cockroach ootheca. One of them was laid by Japanese cockroaches (Periplaneta japonica), the rest look like smoky cockroaches (P. fulinginosa). Previously, it was believed that the latter species was brought to Japan only in the 18th–19th… Continue reading Traces of cockroach ootheca found in Jomon period ceramics

The return of bison has made the prairie vegetation more diverse

The reintroduction of bison to areas of the prairie where they once lived but were exterminated by humans has a positive effect on the local flora, American ecologists have found. After analyzing the results of an experiment lasting about thirty years, they found that in the presence of bison, the species diversity of prairie plants… Continue reading The return of bison has made the prairie vegetation more diverse

An antilaser with a degenerate cavity turned out to be an excellent absorber

Physicists combined the idea of ​​a coherent ideal absorber (antilaser) with the concept of a degenerate resonator. The constructed optical system effectively absorbs light incident on it from various angles, and its operation has proven to be resistant to typical interference in optical communication lines. The study was published in Science. Absorption is an important… Continue reading An antilaser with a degenerate cavity turned out to be an excellent absorber

Insulin pump restores brain structure in diabetic teenagers

Researchers from the United States have found out how different methods of insulin administration affect brain development in adolescents with type 1 diabetes. Typically, this disease causes changes in the structure of the brain and leads to a decrease in cognitive abilities. But as it turned out, those who used an advanced insulin pump (which… Continue reading Insulin pump restores brain structure in diabetic teenagers

Ornithischian dinosaurs began living in packs already in the Jurassic period

Paleontologists analyzed samples of primitive ornithischians Lesothosaurus diagnosticus, found together in South Africa, and concluded that ornithischian dinosaurs lived in packs as early as the Lower Jurassic. This is the second earliest example of the social lifestyle of ornithischians. The study was published in the journal Palaeontology. Lesothosauruses were small omnivorous dinosaurs that lived in… Continue reading Ornithischian dinosaurs began living in packs already in the Jurassic period

Archaeologists found a birch bark letter in Staraya Russa with a request to buy deer mittens

Archaeologists reported the results of excavations in Staraya Russa. This season they managed to discover the oldest city necropolis, dating back to the 11th – early 12th centuries, as well as two birch bark letters. In the text of the 54th letter, the author is a certain Donkey. Perhaps this is a version of a… Continue reading Archaeologists found a birch bark letter in Staraya Russa with a request to buy deer mittens

Physicists have learned to control the asymmetrical interaction of levitating particles

Physicists using laser tweezers have learned to control the interaction between two bound levitating nanoparticles that act on each other with different forces. By changing the parameters of the laser beam, scientists controlled the position of the particles, the amplitude and phase of their oscillations, and the force of interaction. The method will make it… Continue reading Physicists have learned to control the asymmetrical interaction of levitating particles