This Bird 'Eyeball' Survived 120 Million Years
By Laura Geggel, Live Science, January 11, 2018
https://www.livescience.com/61405-dinosaur-age-birds-saw-in-color.html
An Amazing Fossilized Eye Reveals How an Ancient Bird Saw
Feast your eyes on this. By Natasha Frost, January 12, 2018
https://www.atlasobscura.com/articles/amazing-fossilized-ancient-bird-eye-color-rods-cones
The paper is:
Tanaka, G., Zhou, B., Zhang, Y., Siveter, D.J. and Parker, A.R.,
2017. Rods and cones in an enantiornithine bird eye from
the Early Cretaceous Jehol Biota. Heliyon, 3(12), p.e00479.
http://www.heliyon.com/article/e00479/
Yours,
Paul H.