Ethiopian middle-distance runner Diribe Welteji has been barred from the world track championships a day before her first ...

South Sudan First Vice President Riek Machar faces treason and other serious crimes, local justice authorities said Thursday.

The Toba catastrophe hypothesis was one prominent school of thought for many years. It proposes that the Toba supereruption caused a global cooling event that lasted up to six years. Its effects, ...