Cortisol is the body's main stress hormone. Too much cortisol over time may harm memory and brain health, but the cortisol-dementia link is complex and mostly correlational. Managing stress, sleep, ...

Microscopic fibers secretly shape how every organ in the body works, yet they’ve been notoriously hard to study—until now. A ...

Even beyond the pendulum lurches between presidencies, many of the perennial debates over education policy, politics, and ...

Recent research indicates that the number of words a person can list in a specific category within just fifteen seconds may ...