قالب وردپرس درنا توس
Home https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ Science https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ Seeing Red in Fossil Record

Seeing Red in Fossil Record



What color was T. Rex? What about triceratops or glyptodone? Until recently, the priest's gallery was the only proceeds of daydreams, CGI artists or children with crayons.

Advances in imaging technology bring us closer to real answers. Over the last decade, we have learned that Sinosauroptery tail was striped, and Microraptor's head was blue black and shiny like a collar.

A paper published Tuesday in Nature Communications adds to the paint box. In it, a research group gives the first crucial fossil proof that an old creature contained pheomelanin ̵

1; the same pigment that gives a red hue to chicken feathers, tiger fur and your freckles. Their results and the method that led them will allow researchers to seek more evidence of this color over the fossil record.

[ Like the Science Times page on Facebook. ] | Sign up for the newsletter Science Times. ]

Even in well-preserved fossils, the pigments deteriorate rapidly. Scientists have a few solutions to find traces of color. Some look for melanosomes, the organelles in animal cells that produce and store pigments. The shape of a melanosome may indicate what type of pigment was once inside, while the organization of melanosomes within a feather may indicate whether a bird (or dinosaur) was dull or iridescent.

Next, the team used spectroscopy to zoom in on two key elements: zinc and sulfur. In today's mammals and birds, pheomelanin is closely linked to particular zinc sulfur compounds. The researchers also saw these in fossils, which means that their fur had been filled with the reddish pigment. They found a higher concentration of them on the dorsal side, suggesting that the mouse had a lighter stomach.

"By understanding the delicate relationship between zinc and sulfur, we can say for the first time with certainty:" Yes, this is pheomelanin pigment in the fossil record, "Dr. Manning says.

More important than their conclusion If the color of the mouse is what their process allows, earlier methods of detecting color were piecemeal or destructive, but "this new method seems to allow the mapping of color pigments across an entire fossil," said Mike Benton. Paleontologist at the University of Bristol who was not involved in the study.

The group is working on further streamlining of the scanning method "so that it is easy for everyone to come and bring fossils," says Dr. Bergmann.

Prehistoric World, get ready to start blushing.


Source link