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The story of the old days, our story, that of the slow emergence of the hominid, the difficult breakthrough of consciousness, the heavy rising of body to erect stance and the touching instability of first bipedalism, the clumsiness of first attempts to shape stone and the moving tenacity to improve them.

In this potent book, three eminent scientists—an astrophysicist, an organic chemist, and an anthropologist—ponder and discuss some of the basic questions that have obsessed humankind through the ages, and offer thoughtful, enlightening answers in terms the layperson can easily understand. Until now, most of these questions were addressed by religion and philosophy. But science has reached a point where it, too, can voice an opinion. Beginning ...

Media poco mas de un metro de altura, ya era bipeda, pero aun sabia trepar a los arboles. Habia nacido en las sabanas del Plioceo africano y murio en el lago de Hadar a los veinte anos de edad. Ya no era un simio, pero todavia no era humana. Tres millones de anos despues, en 1974, los paleontologos Yves Coppens, Donald Johanson y Maurice Taieb descubrieron una cuarentena de huesos de un australopiteco hembra. Cuenta la leyenda que en ese momen...