RIO DE JANEIRO (AP) — Brazilian President Luiz Inácio Lula da Silva will undergo a new procedure on Thursday following up on an unplanned surgery earlier this week for a brain bleed ...

Luiz Inacio Lula da Silva underwent tests that showed improvement in his medical condition as the Brazilian president ...

Russia and other hostile states have become increasingly brazen in adopting “gray zone” attacks against Europe and the United States, leaving defense officials with a dilemma: How to respond ...

The lack of methods for preparing miniature lasers directly on silicon wafers is holding back photonic technology in a range of applications, including machine learning. The solution could be to ...