University of Barcelona

Society prefers immigrants who are women, young, highly educated and in skilled employment – even though there is greater demand in the labour market for low-skilled workers – according to a meta-analysis that brings together data on more than 140,000 people from 36 countries. Respondents also expressed a preference for immigrants who do not come from Muslim countries and who migrate to escape violent situations rather than for economic reasons, according to the article published in Science Advances.

Ageing is characterised by the accumulation of cellular damage. Among the biomarkers associated with this process are epigenetic ‘clocks’, which analyse non-genetic modifications of DNA over time. However, these approaches have certain limitations, as they do not reflect the activity of specific genes. Now, a study published in Nature has analysed more than 11,000 transcriptomes from over 25 tissues in mice, rats, macaques and humans, showing that ageing-associated changes are conserved across species and cell types. The findings reveal universal transcriptomic signatures of ageing and mortality in mammals. Using these data, the authors developed their own molecular ‘clocks’, capable of estimating biological age and expected mortality.

In 2023, 1.17 billion people suffered from a mental health disorder, compared to 599 million people in 1990, according to a global study published in The Lancet. Women experienced higher rates of anxiety and depression, while neurodevelopmental and behavioral disorders—such as ADHD or autism—are more common in men. The highest incidence was observed among those aged 15 to 19, which, according to the authors, underscores the need for early prevention and targeted support for this age group.

The Ministry of Health has announced that Spain will receive the MV Hondius in the Canary Islands “in accordance with international law and the spirit of humanitarianism”. The government is thus responding to a request from the World Health Organisation (WHO) and the European Union for the cruise ship, which is travelling from Argentina and has an outbreak of hantavirus on board, to dock in the Canary Islands, in the port of Granadilla, Tenerife. The European Centre for Disease Prevention and Control has assessed which passengers should be evacuated from the ship to Cape Verde, where it is currently located, and which will continue on to the Canary Islands. Once there, they will be examined and transferred to their home countries in accordance with safety protocols. The cruise ship is expected to arrive in the archipelago in three or four days.

The hallucinogen psilocybin, found in certain mushrooms, is being investigated as a treatment for conditions such as depression. A study published in Nature Communications shows that a single 25 mg dose of the compound can produce brain changes lasting up to a month after administration. These were measured using neuroimaging techniques in 28 healthy adults who had never taken psychedelics. In terms of psychological effects, participants showed increased cognitive flexibility, psychological insight, and well-being after one month.

A review published in The Lancet Psychiatry has examined the prevalence of major depressive disorder during pregnancy, the peripartum period—immediately before and after childbirth—and the postpartum period—up to twelve months after childbirth. The study, which used data from more than two million women and girls aged 10 to 59 from all regions of the world, showed that approximately one in 15 (6.8%) is affected by major depression during the year following childbirth and that the prevalence was highest during the first two weeks after childbirth (8.3%). The authors call for greater integration of screening, prevention, and treatment of this disorder during the peripartum period into current care models.

Craig Venter, the American biologist and entrepreneur who founded Celera Genomics to launch his own Human Genome Project in 1999 outside the public consortium, died Wednesday in San Diego at the age of 79, according to a statement from the J. Craig Venter Institute, which he led. Among other achievements, Venter completed the first full sequencing of a living organism’s genetic material and announced that he had succeeded in creating synthetic life.

The deliberate consumption of soil—known as geophagy—is a common practice among animals, either to supplement their diet or as a protective mechanism against intoxication and other digestive issues. For the first time, a research team with Spanish participation has documented this behaviour in Barbary macaques in Gibraltar, particularly during the summer, when tourist numbers peak. This has led the authors of the study, published in the journal Scientific Reports, to hypothesise that the purpose of geophagy is to mitigate the digestive discomfort caused by food provided by visitors.

The latest forecasts from the European Centre for Medium-Range Weather Forecasts (ECMWF) suggest that there is a likelihood that the phenomenon known as El Niño will return this year and that it will do so with greater intensity. In Europe, for June through August, the forecast indicates a slight tendency toward below-average precipitation in the northeast of the continent. As for the Iberian Peninsula, temperatures are expected to exceed the top quintile of the seasonal average. Although it is not yet certain that this will occur, forecasts for the coming months will either confirm or rule it out.

Permanent splits in chimpanzee groups are extremely rare—an event that occurs once every 500 years, according to genetic evidence. The journal Science reports on the split of the largest known group of wild chimpanzees following 30 years of observations. This involves the Ngogo chimpanzees in Kibale National Park (Uganda). The group shifted from cohesion to polarization in 2015 and eventually split into two distinct groups in 2018. From that point on, violence escalated, and members of one group killed at least seven males and 17 infants from the other. In the 1970s in Gombe (Tanzania), another case of this type was documented, but the chimpanzees had been fed by humans-