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

Physicists have reproduced the chirping effect at the Kukulcan Pyramid

Colombian physicists have reproduced the unusual acoustic effect observed at the Temple of Kukulcan, located on the Yucatan Peninsula in Mexico. The echo of hand clapping at the base of the pyramid resembles the chirping or chirping of a bird. Simulations showed that this effect occurs due to the addition of many waves reflected from… Continue reading Physicists have reproduced the chirping effect at the Kukulcan Pyramid

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

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 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

The first launch of the SLS rocket was postponed due to a hydrogen leak

The first flight of the SLS super-heavy launch vehicle carrying the Orion spacecraft was postponed due to problems with a hydrogen leak in one of the rocket's core stage engines. The new launch date is set for September 2, 2022. The first launch attempt was broadcast on YouTube. Artemis 1 is the first flight of… Continue reading The first launch of the SLS rocket was postponed due to a hydrogen leak

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

Scientists have grown another batch of artificial mouse embryos

Embryologists again raised mouse embryos outside the mother's body. Recently, a group of Israeli scientists conducted a similar experiment and raised baby mice to the eighth day of development. Now the British have obtained approximately the same result – and at the same time verified that the Israeli embryo culture system ex utero works. The… Continue reading Scientists have grown another batch of artificial mouse embryos

Astronomers have found the best candidate for an ocean exoplanet

Astronomers using ground-based and space telescopes have confirmed the discovery of the super-Earth TOI-1452b around a red dwarf. According to scientists, it is best described by a model of an exoplanet with a global water ocean, the mass of which makes up 22 percent of the total mass of the planet. It is expected that… Continue reading Astronomers have found the best candidate for an ocean exoplanet