There has been a carefully guarded secret in medicine: Evidence is often inconclusive, and experts commonly disagree about what it means.
Most medical decisions aren't cut and dried. Instead they're usually made with uncertainty about what is best for each person.
This uncertainty secret has been revealed in a very public disagreement among experts about who should be treated for high blood pressure. The controversy hinges on the level of blood pressure that should serve as a trigger for treatment.
Centuries before the U.S. was colonized, the British were handing down estates and titles from father to son. Never from mother to daughter.
Then came the royal pregnancy last year. The Duke and Duchess of Cambridge, aka William and Kate, had a boy, George. But before the prince was born and his sex known, Parliament changed British law so a first-born girl could inherit the throne. And a group of female aristocrats began fighting to apply the principle more broadly.