Astronomers have spotted something remarkable hiding in the depths of the Milky Way—a nearly perfect circle formed from the ...

But are the nuclei of atoms really round? Intuitively this shape makes sense and physicists believed it aptly explained early ...

San Marino is inscribed as a testimony to the continuity of a free republic since the Middle Ages. The inscribed city centre includes fortification towers, walls, gates and bastions, as well as a ...