... let these same changes cause the number of rabbits very slowly to decrease, and the number of hares to increase; the effect of this would be that the fox or dog would be driven to try... The Edinburgh Review - Página 506 1860 Vista completa - Acerca de este libro
...would be driven to try to catch more hares, and his numbers would tend to decrease ; his organization, however, being slightly plastic, those individuals...the lightest forms, longest limbs, and best eyesight (though perhaps with less cunning or scent) would be slightly favoured, let the difference be ever...