True's beaked whale.jpg

Western spotted skunk

Hooded skunk

Yellow-throated Marten


Archive for June, 2015

Protein in dinosaur fossils, new paper

Friday, June 12th, 2015

A second group has found protein preserved in dinosaur fossils. I wouldn’t call this solid yet, but it is encouraging. This hit the news in September 2009

Fibres and cellular structures preserved in 75-million–year-old dinosaur specimens

Exceptionally preserved organic remains are known throughout the vertebrate fossil record, and recently, evidence has emerged that such soft tissue might contain original components. We examined samples from eight Cretaceous dinosaur bones using nano-analytical techniques; the bones are not exceptionally preserved and show no external indication of soft tissue. In one sample, we observe structures consistent with endogenous collagen fibre remains displaying ~67 nm banding, indicating the possible preservation of the original quaternary structure. Using ToF-SIMS, we identify amino-acid fragments typical of collagen fibrils. Furthermore, we observe structures consistent with putative erythrocyte remains that exhibit mass spectra similar to emu whole blood. Using advanced material characterization approaches, we find that these putative biological structures can be well preserved over geological timescales, and their preservation is more common than previously thought. The preservation of protein over geological timescales offers the opportunity to investigate relationships, physiology and behaviour of long extinct animals.
Nature Communications 6, Article number: 7352, 09 June 2015

Links for June 2015

Wednesday, June 10th, 2015

Pseudoscience: IgG Food Intolerance Tests
William Thompson, the Savannah, Georgia Daily Morning News editor who designed the Confederate flag describes its racist meaning
What the rich want, everyone in the US gets. Survey data
Making Leavers machine lace
Why early Chlamydia vaccines failed (and lowered resistance to Chlamydia)