Optical sensors are a broad class of device for detecting light intensity. This can be just a simple component for notifying when ambient light levels rise above or fall below a prescribed level, or a ...

Synthesis of nanostructured cubic phase SnO 2 thin film and its trace-level sensing of CO gas This study presents a cubic phase SnO 2 thin film gas sensor with ultra-high CO sensitivity and 1 ppb ...

Tiny robots smaller than a grain of rice can sense, think, and move on their own. They could one day fix tissue inside the human body.

The best sleep trackers can help you learn more about your sleep, improve it and feel more rested as time goes on. Caroline Igo (she/her/hers) was a wellness editor at CNET and holds Sleep Science ...