98.08.11 - Study finds more fraternal twins in lands of plenty. Study finds more fraternal twins in lands of plenty. Because of the greater chance of survival, fraternal twins are born more often in areas of sufficient food supply and greater natural resources.
Study finds more fraternal twins in lands of plenty.
Lummaa V, Haukioja E, Lemmetyinen R, Pikkola M. Natural selection on human twinning. The journal Nature on the web.