Sleep has two phases: non-rapid eye movement (NREM) and rapid eye movement (REM). It also has four stages that repeat in 4 to 6 cycles nightly. Each stage affects your body differently, from light ...

When you walk into a supermarket, the egg case is one of the clearest barometers of how the food system is coping with stress. Prices, package sizes, and even which brands are left at eye level shift ...