Proactive, that is, unsolicited, prosociality is a key component of our hyper-cooperation, which in turn has enabled the emergence of various uniquely human traits, including complex cognition, ...morality and cumulative culture and technology. However, the evolutionary foundation of the human prosocial sentiment remains poorly understood, largely because primate data from numerous, often incommensurable testing paradigms do not provide an adequate basis for formal tests of the various functional hypotheses. We therefore present the results of standardized prosociality experiments in 24 groups of 15 primate species, including humans. Extensive allomaternal care is by far the best predictor of interspecific variation in proactive prosociality. Proactive prosocial motivations therefore systematically arise whenever selection favours the evolution of cooperative breeding. Because the human data fit this general primate pattern, the adoption of cooperative breeding by our hominin ancestors also provides the most parsimonious explanation for the origin of human hyper-cooperation.
The ovary in breast cancer Richiger de Arranz, E; Reeves, G; Tozzini, R ...
Prensa médica argentina,
1969-Nov-07, Letnik:
56, Številka:
36
Magazine Article
In 9 female patients with breast cancer, we studied the diagnostic uptake of I131 at 24 hours, localization of I131 in the thyroid, primary breast tumor and its metastases, urinary excretion of I131 ...at 24 hours and PBI131, and came to the following conclusions: 1. Low normal values for uptake at 24 hours was observed as in previous studies. 2. There was no I131 uptake in the primary breast tumor or its metastases. 3. The sum of 24 hour uptake levels plus the urinary excretion at 24 hours were within normal limits. 4. Therefore, the relatively low uptake figures, which were repeatedly observed in these patients, are not due to competition between the thyroid uptake of I131 and the neoplastic tissue.
Results in the treatment of breast cancer Miechi, J H; Gonzalez Garcia, C; Richiger de Arranz, E ...
Prensa médica argentina,
1969-Nov-07, Letnik:
56, Številka:
36
Magazine Article
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