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Tiny solid particles – like pollutants, cloud droplets and medicine powders – form highly concentrated clusters in turbulent environments like smokestacks, clouds and pharmaceutical mixers. What causes these extreme clusters – which make it more difficult to predict everything from the spread of wildfire smoke to finding the right combination of ingredients for more effective drugs – has puzzled scientists. A new University at Buffalo study, published Sept. 19 in Proceedings of the National Academy of Sciences, suggests the answer lies within the electric forces between particles.

Dr. Alan Sager, professor of health law, policy & management at Boston University School of Public Health, discusses his new book The Easiest, which presents a guide to thorough healthcare reform in the US. By strategically redirecting trillions of dollars in wasteful spending, the US can achieve affordable and high-quality care for all.

In amateur soccer players, more frequent heading, or using the head to control or pass the ball, is linked to alterations within the folds of the brain, according to a study published on September 17, 2025, in Neurology^®, the medical journal of the American Academy of Neurology. The study does not prove that soccer heading causes brain changes, it only shows an association.