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 genome of the “immortal” jellyfish has been sequenced

Spanish scientists have compiled a list of genes that are likely responsible for the “immortality” of the jellyfish Turritopsis dohrnii. To do this, they sequenced its genome and compared it with the genome of a jellyfish. Turritopsis rubra. It turned out that the “immortal” jellyfish, unlike its relative, acquired additional copies – up to eight… Continue reading The genome of the “immortal” jellyfish has been sequenced

Watering with ethyl alcohol protected the rhizome from drought

Japanese geneticists have proposed increasing the drought resistance of plants using ethanol. They watered Tal's rhizomes (Arabidopsis thaliana) with a weak alcohol solution for three days and showed that this helped the plants survive the subsequent three-week drought. In response to alcohol, the plant activates the synthesis of the stress phytohormone, abscisic acid, which helps… Continue reading Watering with ethyl alcohol protected the rhizome from drought

Physicists saw Rabi oscillations using extreme ultraviolet light

European physicists have reported the observation of characteristic doublets in the spectra of electrons knocked out of helium atoms by coherent light in the extreme ultraviolet range. The result obtained indicates the occurrence of Rabi oscillations in atoms. The shape and position of the doublets could be theoretically reproduced only after taking into account the… Continue reading Physicists saw Rabi oscillations using extreme ultraviolet light

Physicists simulated militant Redditors with GameStop shares

European physicists used a large amount of data from the r/wallstreetbets subreddit, as well as the dynamics of securities prices, to understand the mechanisms of self-organization of a large number of people using the example of the scandal surrounding the unexpected rise of GameStop shares. The mathematical model they developed of a voter under the… Continue reading Physicists simulated militant Redditors with GameStop shares

Lullabies and lisps have proven to be culturally universal

Representatives of 21 different cultural communities around the world communicate acoustically with babies and sing lullabies to them. This was discovered by American scientists who collected and analyzed an audio corpus of 1,615 recordings of singing and conversations addressed to young children and adults. It turned out that communication with babies has its own culturally… Continue reading Lullabies and lisps have proven to be culturally universal

Time inversion symmetry turned out to be important for near-magic nuclei

A team of physicists from 10 countries reported an experimental study of how the electric quadrupole and magnetic dipole moments of indium isotopes depend on the number of neutrons in them. The indium nucleus is interesting because its number of protons is one less than the nearest magic number. This makes indium a good object… Continue reading Time inversion symmetry turned out to be important for near-magic nuclei

Chemists have unraveled the biosynthesis pathway of strychnine and reproduced it in tobacco

Biochemists from Germany have found out how in chilibukha Strychnos nux-vomica biosynthesis of strychnine and its analogues occurs. Scientists have discovered 9 enzymes responsible for biosynthesis reactions and completely reproduced the open synthesis pathway in Bentham tobacco Nicotiana benthamiana. The study was published in the journal Nature. Strychnine is a toxic alkaloid that was first… Continue reading Chemists have unraveled the biosynthesis pathway of strychnine and reproduced it in tobacco

The combination of an immunodrug and CAR-T lymphocytes saved the lives of mice with cancer

American researchers have managed to significantly increase the effectiveness of therapy for hematological cancer diseases using lymphocytes with chimeric antigen receptors (CAR-T lymphocytes) in preclinical trials. To do this, they used an experimental drug – a modified human cytokine that stimulates lymphocyte growth. In experiments in vitro and in animal models of mouse and human… Continue reading The combination of an immunodrug and CAR-T lymphocytes saved the lives of mice with cancer

2000 generations of bacteria have proven the leading role of spontaneous mutations in the process of evolution

American researchers tracked the evolution of four bacterial combinations with different sets of initial characteristics over 2,000 generations. The experiment showed that, although genetic diversity is essential in the early stages of adaptation, random mutations play a major role in the evolutionary process during asexual reproduction. A preprint of the work is available on the… Continue reading 2000 generations of bacteria have proven the leading role of spontaneous mutations in the process of evolution