New research sheds light on how the brain's prefrontal cortex evaluates whether to persist or quit in uncertain situations.

Brazilian President Luiz Inacio Lula da Silva was in "stable" condition after emergency surgery Tuesday for an intracranial ...

Lula was taken late Monday to Brazil's top medical facility, Hospital Sirio-Libanes in Sao Paulo, after experiencing ...

Brazilian President Luiz Inacio Lula da Silva was taken to Sao Paulo overnight for emergency surgery to drain a bleed on his ...

Brazilian President Luiz Inacio Lula da Silva was in “stable” condition after emergency surgery yesterday for an intracranial haemorrhage and should leave the hospital ...