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Paulo Sérgio Pinheiro: Violence without limits

December 1, 2006 12:00 am Published by

A UN study coordinated by a Brazilian sociologist reveals that children are the victims of mistreatment and aggression throughout the world, at all classes and environments, whilst society accepts the phenomenon with complacency

The ethanol race

December 1, 2006 12:00 am Published by

Researchers look for solutions that will reduce alcohol costs

Track-cleaner

December 1, 2006 12:00 am Published by

Spraying system eliminates weeds that hinder the locomotion of trains