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.
O que nos faltava entender era que nestes ambientes mundiais de humidade sazonal, o solo e a vegetação desenvolveram-se juntamente com grande número de animais de pasto, e estes herbívoros desenvolveram-se com ferozes predadores de rebanhos.