While glass balls have been found on the lunar surface before, the translucence of these new ones is what makes them unique. Some glass balls as large as 40 millimeters across were found during ...

‘Gazing Ball’ was a meticulous copy of an altarpiece by the 16th-century Italian artist Pietro Perugino, Madonna and Child with Four Saints, offset by a blue glass ball. Koons said the purpose of the ...