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.
Mes nesupratome, kad vietose, kur drėgmė kinta sezoniškai, dirvožemis ir vegetacija vystėsi kartu su milžiniškomis bandomis besiganančiais gyvūnais, o pastarieji vystėsi kartu su žiauriais, gaujomis medžiojančiais plėšrūnais.