Xenohormesis is a variation of a more general theory, hormesis, which interests Suresh Rattan of Aarhus University in Denmark.

ECONOMIST: How to live longer��maybe

Monetarists correctly argued that inflation is always a monetary phenomenon, but the newly revived theory that was long ago dismissed even by Friedman is merely a variation of the much discredited Phillips Curve.

FORBES: Monetarism and Keynesianism: Identical Sides of the Same Adolescent Coin

This, the theory goes, would bolster variety in an individual's offspring above and beyond the variation already provided by sexual reproduction.

ECONOMIST: Brain development may be influenced by genetic parasites