New research on heart rate variability suggests that composure isn’t a personality trait. It’s a physiological skill the nervous system can train—one that may determine who thrives when the stakes are ...

Slow breathing and cold plunges promise calm. But real vagus nerve treatments are more complex and still under study.

Nancy Guthrie, the 84-year-old mother of Savannah Guthrie, has been missing from her Arizona home since Jan. 31. Law enforcement believes she was likely abducted, and her family has made a public plea ...