Stewart Brand: Well, the earlier point is we interfered in a big way by making these animals go extinct, and many of them were keystone species, and we changed the whole ecosystem they were in by letting them go.
Stewart Brand: Bien, el primer punto es que interferimos muchísimo cuando hicimos que estos animales se extinguieran, y muchos eran especies claves, y cambiamos todo el ecosistema del que eran parte cuando los dejamos ir.