The Ring of Fire is home to 75% of the world's volcanoes and 90% of its earthquakes. 2 min read The Ring of Fire is a roughly 25,000-mile chain of volcanoes and seismically active sites that ...

The tlamatlquiticitl—midwife—offered those in her charge a remarkable 16th-century birthing plan, combining practical care, drugs for pain relief, and religious ceremonies. This story appears ...

Oura released its newest model, the Oura Ring 4 on October 15. The device features several cosmetic changes as well as some significant hardware improvements. First, the Oura Ring 4 replaces the 3 ...

The National Academies of Sciences, Engineering, and Medicine are private, nonprofit institutions that provide expert advice on some of the most pressing challenges facing the nation and world. Our ...

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 ...

The five phases of mitosis and cell division tightly coordinate the movements of hundreds of proteins. How did early biologists unravel this complex dance of chromosomes? The most obvious ...

With the smart ring market hotting up – it’s the turn of the Oura Ring 4 to show us what it's got. The Oura Ring 4’s incredible insights mean it’s still one of the best wearables on the ...

She has tested body pillows, mattresses, and other sleep technology. We’re currently testing the recently released Oura Ring 4, and will update this guide soon with our impressions. If you haven ...

I wanted to see which was best, and the Oura Ring Gen 3 was the clear winner. Well, it’s been about two weeks since my experiment ended, and there’s now a new winner: the Oura Ring 4.

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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 ...