Today's Good News Index

A new study shows smartwatches could help track drinking habits more accurately, supporting better health interventions.

A new floss device can measure stress hormone levels in real time using saliva, offering a simple and accurate tool for health tracking.

New research shows how light can be bent, focused, and even changed in color using structures so small they’re invisible to the eye.

Following a healthy eating plan might help lower the risk of dementia, including Alzheimer’s disease. A recent study involving nearly 93,000 adults across the United States showed that people who…