The Tonga volcanic eruption unleashed explosive forces that dwarfed the power of the Hiroshima atomic bomb, NASA scientists have said, as survivors on Monday described how the devastating Pacific blast "messed up our brains". The NASA Earth Observatory said the Hunga Tonga-Hunga Ha'apai...

NEW YORK (AP) — The crisis in Ukraine is hardly going away — a showdown of two world views that could upend Europe. It carries echoes of the Cold War and resurrects an idea left over from the 1945 Yalta Conference: that the West should respect a Russian sphere of influence in Central and...

Clashes between U.S.-backed Syrian Kurdish fighters and militants continued for a fourth day Sunday near a prison in northeastern Syria that houses thousands of members of the Islamic State group, the Kurdish force said. The standoff follows a bold assault by the extremists that breached the...

A group of migrants huddles beside a small, smoky fire inside an abandoned building in northern Serbia, the last moments of warmth before they set out into the driving snow toward the razor wire, cameras and sensors of Hungary's electrified border fence. A few hours later, they return, their...