The Hegman fineness-of-grind gauge continues to be one of the most widespread and user-friendly tools for assessing the quality of particle dispersion in inks, paints, coatings, and related materials.

National security, unlocked. Each Thursday, host Mary Louise Kelly and a team of NPR correspondents discuss the biggest national security news of the week. With decades of reporting from battlefields ...

If you wake up with tooth, jaw, ear or head pain you may have sleep bruxism, which that means you grind or clench your teeth when you sleep. If you have a mild case, you can try to treat it at home.

Injury and illness surveillance, and epidemiological studies, are fundamental elements of concerted efforts to protect the health of the athlete. To encourage consistency in the definitions and ...

We are at a critical time and supporting climate journalism is more important than ever. Science News and our parent organization, the Society for Science, need your help to strengthen environmental ...