A smudge of blue on an ordinary-looking stone has forced archaeologists to rethink what Ice Age people in Europe could see, ...

Among the many treasures to be found on Michigan beaches, Leland Blue has quickly become one of the most beloved. The stone — which comes in brilliant shades of blue with a tumbled, pockmarked surface ...

Microscopic analysis of an ancient stone found blue pigment, the oldest ever found in Europe. Wisher, et al (2025) Antiquity The seas of the Caribbean, Cookie Monster and the Facebook logo all have ...