How did the old masters make their ultramarine?

Researchers at the Rijksmuseum, the University of Amsterdam, VU Amsterdam and the European Synchrotron Radiation Facility (ESRF) have developed a method that reveals how the costly pigment ultramarine was prepared from the ...

Researchers investigate how squid communicate in the dark

In the frigid waters 1,500 feet below the surface of the Pacific Ocean, hundreds of human-sized Humboldt squid feed on a patch of finger-length lantern fish. Zipping past each other, the predators move with exceptional precision, ...

Squid pigments have antimicrobial properties

Ommochromes, the pigments that colour the skin of squids and other invertebrates, could be used in the food and health sectors for their antioxidant and antimicrobial properties. This is confirmed by analyses carried out ...

The mysterious 'Tully Monster' fossil just got more mysterious

Every now and again, scientists discover fossils that are so bizarre they defy classification, their body plans unlike any other living animals or plants. Tullimonstrum (also known as the Tully Monster), a 300m-year-old fossil ...

Discovered: Unknown yellow colors from antiquity

Archaeologists have long known that artefacts from the Antiquity were far more colorful than one would think when looking at the bright white statues and temples, left behind for today.

Why some greens turn brown in historical paintings

Enticed by the brilliant green hues of copper acetate and copper resinate, some painters in the Renaissance period incorporated these pigments into their masterpieces. However, by the 18th century, most artists had abandoned ...

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