Women’s sleep apnea symptoms differ from men’s and can often be confused with hormonal shifts. Researchers are working to ...

Sleep trackers use your resting heart rate, heart rate variability and breathing data to estimate how long you sleep and how much time you spend in each stage.

Solid rocket motors—and the chemicals that fuel them—are a major limitation on America’s missile stockpiles, and one that cannot be solved by additional funding alone.

The European Space Agency is developing a spacecraft structure that can detect its own damage and repair itself in orbit, a ...