If you ask evolutionary biologists when did humans become humans, some of them will say that, well, at some point we started standing on our feet, became biped and became the masters of our environment.
Se perguntarem a biólogos evolucionistas quando os humanos se tornaram humanos, alguns deles dirão que, em algum momento começamos a ficar de pé, nos tornamos bípedes e os mestres do nosso meio ambiente.