Once We Were Not Alone. (Cover story)

• Autores: Ian Tattersall
• Localización: Scientific American, ISSN 0036-8733, Vol. 282, Nº. 1, 2000, págs. 56-56
• Idioma: inglés
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• Resumen

  • Discusses the theory that at one time several species of homonids coexisted together, offering possible reasons that only one, Homo sapiens, survived. Past hypotheses concerning homonids; Evidence for homonid diversity; Where each of the species may have been located and how they may have become extinct; Speculative family tree; Discussion of culture, intelligence and language.