Metal-containing aerosols are present throughout the Earth’s atmosphere, originating from both natural and human-made sources ...

The Education Department is taking inventory of its remaining functions, after going through mass layoffs Tuesday that, in some cases, wiped out entire units and functions. The department laid off ...

Syria’s new leader has vowed accountability and an investigation after reports of mass killings of Alawite civilians triggered an international backlash against the worst violence since Bashar ...