The change from a vegetarian to an omnivorous diet, once made, persisted in Homo erectus , Neanderthal man and Homo sapiens . From the ancestral light Australopithecus onwards, the family of man ate some meat: small animals at first, larger ones later. Meat is a more concentrated protein than plant, and eating meat cuts down the bulk and the time spent in eating by two-thirds. The consequences for the evolution of man were far-reaching. He had more time free, and could spend it in more indirect ways, to get food from sources (such as large animals) which could not be tackled by hungry brute force. Evidently that helped to promote (by natural selection) the tendency of all primates to interpose an internal delay in the brain between stimulus and response, until it developed into the full human ability to postpone the gratification of desire. But the most marked effect of an indirect strategy to enhance the food supply is, of course, to foster social action and communication. A slow creature like man can stalk, pursue and corner a large savannah animal that is adapted for flight only by co-operation. Hunting requires conscious planning and organisation by means of language, as well as special weapons.Lo he copiado literalmente, es una de las posibilidades que permite leer los libros en Google Books. No es que Google me pague, pero me parece una opción interesante, y la reflexión que hace Bronowski también.
Y con esta entrada trataré de reinaugurar esta bitácora abandonada, que parece que vuelvo a tener algo de tiempo libre.