Physicians have long observed a mystifying phenomenon: After a bout of infection or an autoimmune disease flare-up, some ...

William Strauss and Neil Howe laid out a theory in their book “The Fourth Turning” that history does not march straight ahead. It spins in circles. They argue it follows a cycle of four phases called ...

HAVE you ever met someone who, one day, is full of energy, talking fast, making big plans, and then, a few days or weeks later, withdraws completely, feeling hopeless and drained? You might have ...

Explore the science behind why we often feel better in the morning. Discover how mental health fluctuates throughout the day.