Signs of the color blue have been found in a fossil for the first time
ScienceNews - Tue 25 Jun 19Scientists think they’ve spotted hints of blue plumage in a fossilized bird from 48 million years ago.
Blue color tones in fossilized prehistoric feathers
Phys.org - Tue 25 Jun 19Examining fossilised pigments, scientists from the University of Bristol have uncovered new insights into blue colour tones in prehistoric birds.
Blue color tones in fossilized prehistoric feathers, Eurekalert - Tue 25 Jun 19