Subscribe
Subscribe
MY AMERICAN SCIENTIST
LOG IN! REGISTER!
SEARCH
 
Logo IMG
HOME > MULTIMEDIA > Multimedia Detail

SCIENCE IN THE NEWS DAILY

Fossil Ink Sacs Yield Jurassic Pigment--A First

from National Geographic News

The ink's been dry for 160 million years--but scientists have for the first time confirmed pigment in two fossilized ink sacs from cuttlefish-like animals, a new study says.

The ancient ink's similarity to modern squid ink suggests this defensive weapon hasn't evolved much since the Jurassic period (prehistoric time line). The brownish-black fossil pigment--a type of melanin called eumelanin--is widespread in the animal kingdom, for example in bird feathers, squid ink, and human hair and skin. The substance has various functions, including protection from the sun and camouflage.

Scientists have previously found hints of eumelanin in fossils, but they've done it through indirect, less reliable means--such as by analyzing images of presumed granules, which is problematic in part because melanin granules resemble bacteria, said study co-author John Simon.

Read more...


comments powered by Disqus
 

Connect With Us:

Facebook Icon Sm Twitter Icon Google+ Icon Pinterest Icon RSS Feed Instagram Icon

Latest Multimedia

2015-08WyskMMClick to Enlarge Image

PODCAST & VIDEO: 3D Printing Replacement Body Parts

Regenerative medicine, a fledgling field with the aim of regrowing parts from a person’s own cells, is being amplified with 3D-printing technology, which can now use organic materials to create scaffolds that cells need to grow into their final forms. Richard Wysk, a professor of industrial and systems engineering at North Carolina State University, discusses the latest successes with this research, and the timeline for creating more complicated structures.

To view all multimedia content, click "Latest Multimedia."



RSS Feed Subscription

Receive notification when new content is posted from the entire website, or choose from the customized feeds available.


EMAIL TO A FRIEND :

Of Possible Interest

Science In The News Daily: Dam Removal to Help Restore Spawning Grounds

Science In The News Daily: A Three-Way Partnership at the Bottom of the Sea

Science In The News Daily: Mammoths Didn't Go Out with a Bang

Subscribe to American Scientist