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.
Si les preguntan a los biólogos evolutivos cuándo los humanos se convirtieron en humanos, algunos responderán que en algún punto comenzamos a caminar erguidos, nos convertimos en bípedos y en maestros de nuestro entorno.