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

In Norway, a repaired arrow from an unlucky hunter was found that had melted from under the ice.

Archaeologists have discovered in Norway the shaft of a medieval arrow, the broken shank of which was repaired by a hunter using sinew. However, apparently, then he was unsuccessful again and his shot missed the target, burying the arrow for several centuries under snow and ice. As the Secrets of the Ice project team reports… Continue reading In Norway, a repaired arrow from an unlucky hunter was found that had melted from under the ice.

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

The burial of a “vampire woman” with a sickle on her neck and a castle on her leg was found in Poland.

Archaeologists have discovered the burial of a “vampire woman” in Poland dating back to the 17th century. An iron sickle lay across the deceased's neck, and there was a padlock on the big toe of her left foot. As reported by Arkeonews, perhaps the reason for the unusual ritual was the appearance of the deceased.… Continue reading The burial of a “vampire woman” with a sickle on her neck and a castle on her leg was found in Poland.

Bushfire smoke raised temperatures in Australia by three degrees

British climatologists studied the distribution of smoke in the stratosphere after bushfires in Australia in 2019–2020. They found that black carbon particles in the smoke increased the average temperature in the lower stratosphere by 0.7 degrees worldwide, with temperatures rising by three degrees over Australia. Additionally, the reaction of smoke and ozone has caused the… Continue reading Bushfire smoke raised temperatures in Australia by three degrees

A burial of a woman from the Koban culture with a bronze mirror was found in the Stavropol region

Archaeologists have discovered the grave of a woman 20–25 years old in the north-west of the Stavropol Territory. The accompanying grave goods and funeral rites made it possible to attribute this find to the Western Koban culture and date it to the second half of the 8th century BC. Among the artifacts found, scientists identified… Continue reading A burial of a woman from the Koban culture with a bronze mirror was found in the Stavropol region

Archaeologists have discovered a bronze figurine of Jupiter in Taman

Archaeologists explored the ancient settlement of Red October-1, located in Taman. As a result of this work, they established that the fortified settlement arose at the turn of the 6th–5th centuries BC and existed until the modern era. Among the rare artifacts discovered at this site were a gray clay lamp in the shape of… Continue reading Archaeologists have discovered a bronze figurine of Jupiter in Taman

Meteorologists predicted the first “triple” La Niña this century

The cold phase of the Southern Oscillation – La Niña – may last until the end of 2022 – early 2023, according to a press release from the World Meteorological Organization. If meteorologists' forecasts come true, for the first time this century, La Niña will be observed for three consecutive winters in the Northern Hemisphere.… Continue reading Meteorologists predicted the first “triple” La Niña this century

An organometallic cocatalyst helped produce ammonia by electrolysis

Chemists from the USA have found a cobalt-based cocatalyst, which, together with a tungsten-based catalyst, makes it possible to effectively produce ammonia from nitrogen under electrolysis conditions. Thanks to this combination of catalysts, the process was able to be carried out at a relatively high potential of −1.35 volts and with a current efficiency of… Continue reading An organometallic cocatalyst helped produce ammonia by electrolysis

Burial of a woman with a 1,400-year-old folding chair unearthed in Germany

Archaeologists have discovered the burial of a woman in Middle Franconia who died at approximately 40–50 years of age around 600 AD. Among her accompanying equipment was a folding iron chair. This is only the second such discovery from the early Middle Ages made in Germany. This was reported in a press release from the… Continue reading Burial of a woman with a 1,400-year-old folding chair unearthed in Germany