Spanish National Research Council (CSIC)

A team of researchers has analyzed more than 300 human genomes from the last 50,000 years and has concluded that most of the gene flow we received from Neanderthals is attributable to a single period, which probably occurred between 50,500 and 43,500 years ago. In addition, Neanderthal inheritance underwent rapid natural selection in subsequent generations, especially on the X chromosome, according to a study published in Science.

Researchers in China have analysed data from more than 4,500 people and identified 13 proteins linked to brain ageing. In addition, changes in protein concentrations in the blood tend to peak at ages 57, 70 and 78. According to the authors, who publish the results in the journal Nature Aging, these ages may reflect transitions in human brain health at specific ages, and could therefore be important for designing possible interventions in the brain ageing process.

More than three-quarters of the earth's land surface experienced drier climates between 1990 and 2020 compared to the previous three decades, according to a new report by the United Nations Convention to Combat Desertification. Over the past 30 years, 40.6 percent of the global landmass, excluding Antarctica, is classified as drylands, three percentage points more than the previous three decades. The report, which is being presented at the COP16 on desertification being held in Riyadh, Saudi Arabia, also shows that 2.3 billion people were living in drylands in 2020, a population that could rise to 5 billion by 2100 under a worst-case climate change scenario.

According to a study published in Nature Medicine, deep brain stimulation of the lateral hypothalamus improves walking and promotes recovery in humans and rodents with spinal cord injuries. In humans, the authors tested this technique on two patients who relied on assistive devices and had difficulty walking; both showed improved performance in the ten-meter and six-minute walking tests. Combined with rehabilitation, the patients experienced recovery that persisted even after the deep brain stimulation was turned off.

The seventh Annual Report of the COSCE Transparency Agreement, prepared by the European Animal Research Association, which analyses transparency in the use of animals for scientific experimentation in Spain in 2023, was presented today. According to the document, transparency is consolidated among the signatory institutions -168 in 2024- and all of them publish a statement on their websites on the use of animals. Public mention of the number and species used stands at 47%, compared to 38% the previous year.

The fifth session of the United Nations Intergovernmental Negotiating Committee to develop an international legally binding instrument on plastic pollution (INC-5) ended without a treaty in Busan, South Korea, in the early hours of the morning. The more than 100 countries participating in what was to be the final round of negotiations have agreed to continue negotiating, reports Reuters.

A study published today in Science reveals a new plastic as durable as conventional plastics that decomposes in seawater. According to the authors, this new material could help reduce microplastic pollution accumulating in the oceans and eventually entering the food chain.

The DANA that devastated the province of Valencia on 29 October, leaving more than 200 people dead and many missing, has been followed by another one, still located over the peninsula. How can we adapt to these extreme phenomena? What repercussions do they have on public health? How can the public prepare for them? The Science Media Centre España organised a briefing session with two experts and an expert from the CSIC to discuss these questions. 

If practices and public policies do not change, the mass of mismanaged plastic waste in the world will double to 121 million tonnes per year by 2050, according to a study published in Science. The article also assesses the potential impact of global measures, such as those envisaged by the forthcoming UN global treaty on plastic pollution, which begins its final negotiating session at the end of this month.

Less than four months after the European Medicines Agency recommended in July not to grant marketing authorisation for Leqembi™ (lecanemab) for the treatment of Alzheimer's disease, the EMA's Committee for Medicinal Products for Human Use (CHMP) has reassessed the available evidence to conclude that the benefits outweigh the risks.