Photoplethysmography (PPG) is an optical sensing technique that measures blood volume changes and underpins devices ranging from hospital-grade pulse oximeters to consumer wearables that track heart ...

Mike Darnay is a digital producer and photojournalist at CBS Pittsburgh. Mike has also written and produced content for Vox Media and the Mon Valley Independent. He often covers overnight breaking ...

Nature Sensors publishes fundamental, applied, and engineering research across the full spectrum of sensing technologies, spanning biological, computational, engineering, and systems domains. The ...