Scientific societal meetings as opportunities for science eduation in developing countries

Brazilian Scientific productivity presented a remarkable growth during the last two decades, as inferred by the number of articles published by Brazilian authors. The number of Brazilian secondary students also grew sharply. Together, those factors lead to a scenario in which there is an increase science produced locally, a great demand for information but a paucity of resources to make it available for the youth. We have evaluated by using quantitative and qualitative approaches the potential of societal meetings as opportunities for science education. Students acquire scientific knowledge and also autonomously develop consistent strategies for choosing and attending activities to maximize their learning. Those results suggest that scientific meetings may represent an underestimated potential for science education in developing countries

Characterisation of microbial attack on archaeological bone

As part of an EU funded project to investigate the factors influencing bone preservation in the archaeological record, more than 250 bones from 41 archaeological sites in five countries spanning four climatic regions were studied for diagenetic alteration. Sites were selected to cover a range of environmental conditions and archaeological contexts. Microscopic and physical (mercury intrusion porosimetry) analyses of these bones revealed that the majority (68%) had suffered microbial attack. Furthermore, significant differences were found between animal and human bone in both the state of preservation and the type of microbial attack present. These differences in preservation might result from differences in early taphonomy of the bones. © 2003 Elsevier Science Ltd. All rights reserved