When fed peanuts, red squirrels in Britain developed weaker bites — showing that food supplements to threatened animals could have unintended side effects.

Experts say clinical obesity is more than a high BMI and instead is a disease in which excess body fat harms tissues, organs or doing daily activities.

Amid doubts over a common decongestant, evidence suggests the placebo effect can still help people suffering from a cold.

For hundreds of millions of years, wildfires were directed solely by the weather, vegetation and terrain. But in the last century in the United States, people have sought to suppress even those ...

After decades of study, scientists sound genuinely optimistic about the possibility of detecting primordial black holes, which might explain dark matter.

Engineers have all the technology they need to make flying cars, but there are still some barriers to getting these sci-fi mainstays off the ground.

Baby Boomers may drive a drastic increase in dementia cases in coming decades, but there are steps people can take to reduce their risk.

Nobel Prizes honored research in biology and AI, including foundational work on artificial neural networks, which enable machine learning and other ...

People who recovered from PTSD changed the way their brains handle intrusive thoughts, a study of survivors of the 2015 Paris terrorist attacks shows.

In some parts of California, fire season is now year-round due to rising heat and little rain. High winds and dry conditions are fueling L.A.’s infernos.

Editor in chief Nancy Shute introduces the new look and format of Science News, as it moves from publishing biweekly to monthly.

Global temperatures were the hottest on record in 2024; it was the first year where the average temperature topped 1.5 degrees Celsius above preindustrial times.