Researchers at Harvard University have developed a lithography technique that uses an array of microscopic lenses to shrink patterns more than 1000 times and repeat them across a surface. The ...

Add Yahoo as a preferred source to see more of our stories on Google. To meet CDC guidelines, the face coverings should allow you to breathe without restriction, include multiple layers of fabric, fit ...

We're all getting used to wearing face coverings while out and about, and you may have noticed that several masks have a small slot to place a filter for extra protection. Adding a filter in between ...

[Editor’s note: A previous version of this post erroneously featured an image of a mask with a valve. The CDC does not recommend valves on masks as they do not help prevent the spread of COVID-19. We ...

While each product featured is independently selected by our editors, we may include paid promotion. If you buy something through our links, we may earn commission. Read more about our Product Review ...

One common concern about cloth face masks is the level of filtration they provide. The fabric’s mesh is often too open to filter out smaller particles such as smoke, dust, or viruses. A popular ...

(NEXSTAR) – Before coronavirus, many of us only saw face masks at the doctor’s office. These days, they’re everywhere, and available in a variety of shapes, sizes, colors and patterns. The Nexvoo ...