In algebra, ring theory is the study of rings, algebraic structures in which addition and multiplication are defined and have similar properties to those operations defined for the integers. Ring ...

New research suggests black holes are unstable, challenging Einstein's theory of general relativity and the Kerr solution.

Gorgeously designed, easy to wear, long-lasting and full of granular health information, the Oura Ring 4 is nearly the perfect fitness tracker. I loved using it, and will continue to do so ...

I’ve made no secret about wearing the Oura Ring smart ring for many years. I am definitely a fan of the product, as is made clear by this longevity, but don’t take this to mean I’ll go easy ...

The conclusions come from patterns tracked by scientists that point to several meteorite impacts through geological records.

For many, the top video doorbell comes down to Ring vs. Nest. Here's how the two compare on price, video quality and features. When you purchase through links on our site, we may earn an affiliate ...

The best ring lights are a must if you're looking to improve the quality of your videos, whether you're streaming on YouTube or hosting a work Zoom call. These simple, donut-shaped devices ...

Both the Oura Ring 4 and the Galaxy Ring are designed to be worn for extended periods of time, so comfort has to be one of the main considerations. The Oura Ring 4 has a comfortable fit ...

I’m PCMag’s senior analyst covering smart home and wearable devices. I’ve been writing about tech professionally for nearly a decade and have been obsessing about it for much longer than that.

Oura's got a new smart ring out. Let's talk about it. The release of the Oura Ring 4 brings the next generation of Oura's popular wearable to the market. Many tech reviewers, such as Mashable's ...

Looks and feels more like jewelry than ever. New Smart Sensing platform makes the ring more accurate and easier to wear. Updated app with interesting new features. Better battery life. Both ...