The number of conflicts between states continued to increase sharply in 2025 and has now reached the highest level since World War II. At the same time, Uppsala Conflict Data Program (UCDP) at Uppsala University registered a record total number of armed conflicts.
It has previously been shown that young, very fit people have an increased risk of atrial fibrillation. A new study of over one million young Swedish men shows that this risk is less than previous calculations showed, and that the benefits in terms of reduced risk for all other cardiovascular diseases outweigh the risk.
Women politicians are significantly more likely than their male colleagues to refrain from speaking out in public for fear of threats or harassment – particularly on issues relating to migration and gender equality. Politicians with an immigrant background are also more likely to avoid making public statements. This is shown by a study based on 43,000 responses from Swedish politicians.
When the Atlantic herring colonised the Baltic Sea thousands of years ago, it needed to adapt to the low salinity. Genes with a vital role in the functioning of sperm, eggs and embryos were crucial to this adaptation. Four specific genes were particularly important, a new study, by researchers from Uppsala University, shows.
Biomarkers in the blood could be used for the early detection of colorectal cancer, lung cancer and ovarian cancer. A new study from Uppsala University shows that the performance of such biomarkers is comparable to or better than established tests and could be developed for clinical use.
Computer simulations can help people gain a better understanding of the situation faced by migrants. This is shown by a new study in which 148 teenagers were assigned random migration pathways, with different start and end points. Along the way, they encountered unforeseen events that affected their journey. Experiences from the game led to a partial shift in attitudes towards migration.
Researchers have identified a previously unknown species of leaf warbler in Japan. Once thought to be a single species, Ijima’s Leaf Warbler, has now been revealed to consist of two: Ijima’s Leaf Warbler and the Tokara Leaf Warbler. It is not their appearance that primarily distinguishes them, but analyses of their DNA and song. The researchers are calling for them to be classified as vulnerable.
Antibiotic treatments can affect the composition of the community of bacteria living in the gut, known as the gut microbiome, for a long time. A new study shows that certain types of antibiotics can be linked to changes in the gut microbiome as long as four to eight years after treatment. The findings have now been published in the scientific journal Nature Medicine.
Researchers have discovered that severe brain tumours in children that appear to be completely different actually arise from the same type of cell. This cell type can give rise to tumours in the pineal gland, the retina and the cerebellum. The discovery that these tumours are related may make it possible to treat them in similar ways.
The climate crisis is not just a physical but also an existential challenge. A new thesis in theology shows how religious faith can complement climate science. While the science often gives rise to climate anxiety, faith offers hope, meaning and motivation for continued action. The study is based on interviews with activists in Sweden and South Africa, from pastors to climate strikers.
People who work at night have a higher risk of coronary artery disease, a type of heart disease. A new study suggests that a higher fibre intake in the diet may help reduce this risk. The study included over 220,000 adults in the UK and is published in the European Journal of Epidemiology.
More cases of colorectal cancer are detected at an early stage with screening. This is according to new research based on data from over 278,000 60-year-olds, who were randomly selected to undergo one of two interventions or no screening at all (usual care). The study, which is a collaboration between Uppsala University and Karolinska Institutet, has been published in Nature Medicine.
