Prehistoric Colors Preserved in Near-Perfect Beetle Fossils

[n2doc]

Despite being tens of millions of years old, some beetle fossils appear almost as they did in life. Not only are their shape and structure preserved, but so are the actual colors of their shells, which have changed only slightly in the intervening eons.

Though relatively little-known, these fossils represent the purest of biological colors retrieved from deep time, far richer than much-celebrated pigment traces of dinosaur plumage and more varied than the hues of a few ancient plants.

In a study published Sept. 27 in Proceedings of the Royal Society B, researchers led by Yale University paleogeologist Maria McNamara analyzed 10 of these spectacular beetle fossils, ranging from 15 million to 47 million years old, which owe their enduring shades to the phenomenon of structural coloration. Unlike pigments, which generate color from light bouncing off a chemical, structural colors are produced by the interaction of light with nanometer-scale surface geometries.

If especially fine-grained sediments replace a dead beetle’s decomposing body, the resulting fossil should replicate its hues, too. “Structural colors don’t need chemicals at all,” said McNamara. “What we wanted to find out was, what kind of structures in the fossils make the color? And are the colors we’re seeing today in the fossils the same as when beetles were alive millions of year ago?”


McNamara’s team took .00008 millimeter-wide samples of the fossils’ surfaces, too small to see unaided but enough to determine surface shape when viewed under an electron microscope. From that shape, they used models derived from modern beetle shells to calculate how the fossils ought to look. Prediction and reality didn’t quite match: According to their calculations, the fossils now appear just slightly more reddish than they ought to. The fossils don’t perfectly replicate the beetle’s original carapaces, and subtly change how light refracts as it passes through shell layers.


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http://www.wired.com/wiredscience/2011/09/beetle-fossil-colors/?pid=2189

[Poll_Blind]

1. Aftrer carefully reading how that process worked I have deemed it a wonder.

Yet I don't know if I can ever really grasp the granular complexity required for that process to work. It's not just like a magician pulling out a tablecloth from underneath an entire dinner set, undisturbed. It's like a magician doing that and then stuffing another tablecloth under them to replace it.

Literally, times a million or however many grains of sediment replaced those structures. And literally, multiplied by every second they existed in that preserved array.

I would buy one of those if I could, and I'm really not the buying things kind of person.

PB

[Joanie Baloney]

2. Thank you for posting this!

So amazingly beautiful...and amazing!

[postulater]

3. Holy Schnikes!

I guess God was a painter six thousand years ago.

[n2doc]

4. But of course!

Since there is no evolution, everything was created exactly as we see it now. Except for those poor dinosaurs who couldn't get on board Noah's Ark.....