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

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

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

The algorithm determined the mouse's pain level based on its muzzle expression

American scientists have developed a cloud platform that can assess the severity of pain in black laboratory mice. She analyzes the expression of the animal's face – the position of its nose, ears, whiskers and the degree of squinting of the eyes. Previously, researchers coped with this task manually, but, as the results show, the… Continue reading The algorithm determined the mouse's pain level based on its muzzle expression

Daily inhalation of laughing gas left the patient unable to walk

American doctors described in The New England Journal of Medicine rare medical case. A patient was admitted to the hospital with symptoms of severe vitamin B deficiency.12 – impaired sensitivity and coordination of movements, up to the inability to walk. It turned out that over the past two months he had been inhaling nitrous oxide… Continue reading Daily inhalation of laughing gas left the patient unable to walk

Archaeologists have found well-preserved fragments of Roman frescoes from a 2,000-year-old temple

Archaeologists have discovered fragments of frescoes during excavations of the 2,000-year-old Temple of Cupra in the Italian commune of Cupra Marittima, CNN reports. They are made in the third Pompeian style. Surviving interior frescoes of this kind are rare. Cupra Marittima, due to its location on the Adriatic coast, was an important port city and… Continue reading Archaeologists have found well-preserved fragments of Roman frescoes from a 2,000-year-old temple

In Spain, a half-meter-long ancient Roman phallus was found carved on a building.

Spanish archaeologists discovered a bas-relief depiction of a phallus during excavations at El HiguerĂ³n in southern Spain. It was carved on the cornerstone of a large ancient Roman building that scientists are exploring in Nueva Carteya in the province of Cordoba, El Pais reports. Phallic symbols and images were widespread in ancient Rome. They were… Continue reading In Spain, a half-meter-long ancient Roman phallus was found carved on a building.

Bioarchaeologists have discovered differences in the diet of men and women from a Roman necropolis

Bioarchaeologists from Spain and South Africa conducted a study of human and animal bones excavated in a Roman necropolis of the 2nd–3rd centuries AD in Barcelona. It turned out that most often the meat of pigs, large and small livestock was used as offerings, that is, species that were regularly eaten in everyday life. At… Continue reading Bioarchaeologists have discovered differences in the diet of men and women from a Roman necropolis

Loneliness in childhood predicted alcohol problems in adulthood

American psychologists have concluded that people who experienced loneliness in childhood (before the age of 12) tend to react more strongly to stress, which makes them more vulnerable to alcohol-related problems between the ages of 18 and 29. The results of the study were published in Addictive Behaviors Reports. A third of people in industrialized… Continue reading Loneliness in childhood predicted alcohol problems in adulthood

The burials of eight male warriors and a female priestess from the era of early nomads have been excavated in Kazakhstan.

Archaeologists excavated three mounds from the era of early nomads in the West Kazakhstan region, which contained the remains of ten people who died at the end of the 6th – beginning of the 5th century BC. The burial ritual and accompanying grave goods suggested that the graves contained eight male warriors, a teenage girl… Continue reading The burials of eight male warriors and a female priestess from the era of early nomads have been excavated in Kazakhstan.