Harvard-affiliated researchers trained AI on more than 40 million facial images, developing tools to estimate biological age and predict mortality risk among cancer patients; the public can now test one tool with a selfie, but experts warn the technology is not ready for clinical use

Technion researchers identify evidence that powerful eruptions near a supermassive black hole are driven by the same magnetic processes responsible for solar storms, revealing a previously unseen connection between the Sun and distant galaxies

A study of older adults links modest daily walking to slower tau protein buildup and cognitive decline, with the strongest associations at 5,000 to 7,500 steps; researchers caution that the findings do not prove walking prevents Alzheimer's disease

Late meals can affect blood sugar and disrupt sleep, but they do not automatically cause weight gain; clinical dietitian Yarden Ovadia explains what studies reveal, why reflux matters and how to decide when to eat your last meal of the day