The ESA/NASA Solar Orbiter mission may have made the first direct observation of what are known as magnetic switchbacks on the Sun. The phenomenon, which consists of S-shaped disturbances that cause sudden reversals of its magnetic field, had been identified by different space probes since the 1970s, but its explanation had only been described theoretically. The finding is published in The Astrophysical Journal Letters.

Although gold is chemically inert, i.e. it resists discolouration and corrosion, its alloys are less resistant. This type of metal in the form of gold leaf is present in the Alhambra in Granada. Two researchers from the University of Granada analyse in the journal Science Advances what causes this corrosion and why purple-coloured nanospheres have appeared.  

A study published in the journal Nature and conducted on mice has found that a communication between the gut and the brain stimulates the desire to consume fats, regardless of whether they can be tasted.

A single amino acid change in a protein (TKTL1) may have given modern humans an advantage over their older contemporaries, such as Neanderthals, by allowing greater neocortical neuronal formation, according to research published in Science.

Psychological distress, including depression, anxiety, worry, perceived stress and loneliness, prior to covid-19 infection was associated with an increased risk of persistent covid, according to research published in JAMA Psychiatry.

A study published in the British Journal of Sports Medicine has found a link between the practice of physical exercise and a lower risk of developing breast cancer in any of its types. The authors claim that there is very strong evidence that the association is causal.

At Paris Saint-Germain's (PSG) press conference ahead of their Champions League opener, Kylian Mbappé and Christophe Galtier (PSG player and coach) were asked about the team's recent trip by plane to Nantes and why they didn't travel by train, when the distance is 341 kilometres and the train takes less than two hours. Both laughed at the question and Galtier replied, ironically, that next time they were considering doing it in a "sailing carriage".

A study published in PNAS analyses changes in happiness in ten European countries, including Spain, from the 1980s to 2018, and relates them to the generosity of their welfare programmes.

Scientists have analysed data on 7.1 million common DNA variants (alterations in the standard sequence) in people with and without Alzheimer's disease. The results, published in PLOS Genetics, have helped them to develop a method that can predict the risk of suffering from this neurodegenerative disease, depending on the DNA variants that a person has and before presenting symptoms.

Researchers have tested a gonadotropin-releasing hormone (GnRH) therapy in mouse models and in males (in a pilot clinical trial) with Down's syndrome. The results, published in the journal Science, suggest improved cognitive function.