They dusted off a 1953 medical paper that linked a risky surgical procedure cutting into the abdomen to strip renal nerves to lower blood pressure.

WSJ: Controlling High Blood Pressure, Through the Kidney

You can lower your blood pressure, perhaps through physical exercise, and mental workouts, such as crosswords and sudoku older people with a history of complex mental activity are less likely to suffer mental decline.

ECONOMIST: The ageing brain