The peaks of European mountains such as the Pyrenees or the Sierra Nevada may be gaining plant species as the climate warms, but this apparent increase in biodiversity is masking a growing wave of local extinctions. These are the main conclusions of a study published in the journal Science, which includes Spanish participation and analyses nearly a thousand vegetation plots spread across 62 European mountain peaks. The reason is that higher-altitude mountain regions have gained plant species in recent decades as plants from lower altitudes have expanded up the slopes, but this may mask the decline or disappearance of specialised, high-altitude resident species.

Thanks to the Voyager probe, we know that Saturn has a long-lasting hexagonal wave at its north pole, which is linked to a powerful jet of matter and energy. Now, a team led by the University of the Basque Country has discovered, for the first time, the presence of a decagonal wave at the south pole. The observations, carried out from the ground and using the Hubble Space Telescope, show that the decagon appears to have formed between 2023 and 2025 and may continue to evolve, in contrast to the more than 40 years of stability exhibited by the hexagon. The research is published in Science Advances and suggests that the ten-sided shape could be a meandering wave trapped by the curvature of a dominant atmospheric current.

A team of researchers, including Nobel Laureate in Physics Roger Penrose, has observed for the first time an effect of gravity on a falling quantum object that had long been predicted. The result demonstrates that a fundamental principle underpinning Einstein’s theory of gravity remains consistent with the behaviour of matter in the quantum world. The study, published in the journal Science Advances, does not unify quantum mechanics and gravity, nor does it prove that gravity itself is quantum.

A meta-analysis involving over a million participants has identified more than a thousand genetic variants associated with human personality. The study, published today in the journal Nature, examines the possible links between DNA variations and differences in personality. The results do not suggest that personality can be predicted from DNA, but rather that some variants may influence behavioural traits, whilst acknowledging that other environmental factors may have a greater impact. In their work, the authors focus on five traits: extraversion, agreeableness, conscientiousness, neuroticism and openness to experience.

Various models estimate that global temperatures will rise by more than 1.5 °C above pre-industrial levels in the coming years, which will increase the vulnerability of societies and economies to climate change. A new report by the United Nations Environment Programme (UNEP) states that it is still possible to reduce temperatures and meet the targets of the Paris Agreement. The report identifies a trajectory of overshoot, peak and decline as the best option. The key would be to minimise the magnitude and duration of this overshoot and to try to return to below 1.5 °C as soon as possible.

A study published in the journal JAMA Network Open assessed the attitudes of Australian teenagers in the context of the implementation of minimum age restrictions on social media use in their country. The research team found that the majority of respondents expressed their intention to continue using social media after the regulations came into force, despite the fact that, in this sample, symptoms of anxiety and depression were associated with a history of social media use and with a younger age at the time of first use.

A team in the United States conducted a clinical trial to study the effectiveness of three types of diets in people with obesity, prediabetes, and fatty liver disease. For approximately five months, 42 people followed a low-carbohydrate, high-fat ketogenic diet, a Mediterranean diet, or a low-fat plant-based diet (14 in each group). Weight loss was similar in all three cases, but those who completed the high-fat diet showed a better response in markers associated with diabetes and liver metabolic function. The results are published in Cell Metabolism.

Baby foods sold in pouches with spouts — intended to supplement nutritional intake from six months onwards — tend to resemble sugary drinks and milkshakes more than nutritious foods, according to an analysis of products from the UK published in the journal Archives of Disease in Childhood, part of the BMJ group. The analysis shows that these products often have a higher sugar content and lower nutritional density than breast milk or infant formula, and frequently lack the texture needed to help babies learn to eat solid foods.

Among the migrants who have been in Ceuta for several weeks, there are confirmed or suspected cases of tuberculosis, chickenpox, scabies and gastroenteritis. Specialists in public health, epidemiology and infectious diseases explain to SMC España the basic recommendations that must be followed when providing care for this population.

A team of researchers in South Korea has analysed the oral and faecal microbiomes of just over 507 volunteers and has concluded that, in patients with gastric and colorectal cancer, there is a greater transfer of microbes from the mouth to the gut. Furthermore, not only does this transfer differ between tumour types, but, according to their findings, an analysis based on oral samples is capable of detecting colorectal cancer with greater sensitivity than the standard faecal occult blood test. However, “before it can be used in practice, clinical trials would need to be carried out in real-world screening populations”, the authors explain. The study is published in the journal Cell Host & Microbe.