Nonlinearity of quantum dot waveguide helps entangle photons

European physicists have studied in detail the interaction of single photons in a photonic crystal waveguide containing a quantum dot. They showed that by varying the duration of the pulses and their delay, it is possible to achieve varying degrees of nonlinearity, as well as control the degree of correlation of light quanta. The study… Continue reading Nonlinearity of quantum dot waveguide helps entangle photons

James Webb takes its first direct image of an exoplanet

The James Webb Infrared Space Observatory has captured its first direct image of superjupiter HIP 65426b as it orbits the yellow-white dwarf in a wide orbit. The image made it possible to clarify the parameters of the planet and prove the high efficiency of the observatory in direct observations of exoplanets. A preprint of the… Continue reading James Webb takes its first direct image of an exoplanet

A galaxy merger could extinguish a burst of star formation.

Astronomers have found for the first time an example of the result of the merger of two galaxies, where the merger process itself inhibited the formation of new stars, throwing out most of the cold gas reserves from the galaxies. In the case of SDSS J1448+1010, about 47 percent of the material needed to form… Continue reading A galaxy merger could extinguish a burst of star formation.

James Webb finds organic molecules in icy particles around a very young protostar

The James Webb Infrared Space Telescope has reliably discovered a number of organic molecules, including complex ones, in the composition of ice particles in the core of the very young protovesche IRAS 15398−3359. In addition, the telescope examined the structure of one of the outflows of matter from the protostar, which consists of four shells.… Continue reading James Webb finds organic molecules in icy particles around a very young protostar

Evolution forced mammals to recreate salivary proteins fifteen times

American bioinformaticians have discovered traces in the genomes of mammals of 15 independent occurrences of new proteins responsible for the viscosity of saliva. According to the findings of the authors of a study published in Science Advancesthe culprit is a region of the genome with a high mutation rate and selection pressure during the evolutionary… Continue reading Evolution forced mammals to recreate salivary proteins fifteen times

Food neurons found in visual cortex

American scientists have found that there are neurons in the ventral optic stream that respond to images of food. They recognized neural signals that, in standard fMRI data analysis, appeared to be drowned out by other nearby populations. Clusters of food neurons were found on both sides of the region of the vesiform gyrus, which… Continue reading Food neurons found in visual cortex

Meteorite impacts were called the reason for the formation of the first continents

Geologists have analyzed the oxygen isotope composition of zircon grains from Archean rocks of the Pilbara Craton. The study suggests that these rocks may have been formed by meteorite impacts, which often occurred in the first billion years of Earth's history. The results of the study were published in Nature. The reasons for the formation… Continue reading Meteorite impacts were called the reason for the formation of the first continents

Nepenthes has adapted to use the energy of falling raindrops to capture victims

One species of Nepenthes, a carnivorous plant common in the jungle, has evolved a mechanism that allows it to use the energy of raindrops for hunting. A drop of water falls on the leaf-cover of the plant and sends the insect sitting on it straight into the trap. However, it turned out that the mechanism… Continue reading Nepenthes has adapted to use the energy of falling raindrops to capture victims

Vitamin D did not reduce the risk of fractures in adults

A randomized, five-year study of nearly 26,000 people found that taking 2,000 international units of vitamin D3 daily did not reduce the risk of fractures in healthy American adults compared with taking a placebo. As reported in the article, published V The New England Journal of Medicinewhen adjusted for age, sex, race, body mass index,… Continue reading Vitamin D did not reduce the risk of fractures in adults

“James Webb” sent pictures of “Cartwheel”

The James Webb Infrared Space Observatory has captured new images of the Cartwheel, a unique system of two galaxies that collided with each other several hundred million years ago. The images show young clusters and star-forming regions, as well as clouds of dust and gas that make up the “Wheel” structure, according to the observatory’s… Continue reading “James Webb” sent pictures of “Cartwheel”