The disappearance of Nancy Guthrie, 84, the mother of the “Today” show anchor Savannah Guthrie, has gripped the nation, with ...

For more than 70 years, physicians seeking to diagnose mental-health conditions have turned to the ‘bible for psychiatry’ — ...

Sleeping underwater might sound peaceful — but for ocean animals, it’s a matter of survival. Some dolphins sleep with one half of their brain at a time, keeping one eye open to avoid danger and ...

Leaders are seen at every level. From presidents of countries and company CEOs to heads of families and even school prefects, ...