The brain-chemical surge that comes with running may bolster coordination and speed in the old and young alike, a new study of middle-aged mice shows. Such physical activity may help restore ease of movement and agility, which often decline as humans and animals get older, the study authors said.

In some regions in Africa, large herbivores struggle to get enough sodium. As many of the continent’s protected areas are in regions where salt levels are low, this scarcity may also affect conservation efforts, according to UZH researchers.

More than half of psychologists experimented with artificial intelligence tools in their practices in the past year, but almost all cite concerns about how the technology may affect their patients and society, according to the American Psychological Association’s 2025 Practitioner Pulse Survey.

A new study shows that in 2023, substance use disorders led to nearly $93 billion in lost productivity in the United States from missed work, reduced job performance, inability to work, and lost household productivity. The novel analysis appearing in the American Journal of Preventive Medicine, published by Elsevier, highlights the need for prevention and treatment strategies to reduce harm and costs.