What we had failed to understand was that these seasonal humidity environments of the world, the soil and the vegetation developed with very large numbers of grazing animals, and that these grazing animals developed with ferocious pack-hunting predators.
Falhamos em compreender esses ambientes de umidade sazonal no mundo. Que o solo e a vegetação se desenvolviam com grandes números de animais de pastoreio, e que esses animais se desenvolviam com a presença de predadores ferozes caçadores de bandos.