HOME >> BIOLOGY >> NEWS
Agonized death throes probable cause of open-mouthed, head-back pose of many dino fossils

ody's antigravity muscles that keep the head upright. Once the cerebellum ceases to modulate the behavior of the antigravity muscles, Faux said, the muscles pull at full force, tipping the head and tail back, contracting the limbs and opening the mouth.

Padian and Faux urge reanalysis of many fossil finds, referring, for example, to a mass death uncovered in Nebraska in the early 20th century. They argue that cerebellar dysfunction explains the opisthotonic posture of the numerous camel-like fossils better than does the common explanation - that the animals died in a stream and were washed into an eddy or backwater.

The authors also point to a fossil of Allosaurus, a T rex-like animal, that displayed bone lesions suggestive of a bacterial infection that also can lead to meningitis, a disease that can produce opithotonus. The authors point out that their explanation of the opisthotonic posture in dinosaurs and other animals provides a way to assess the role played by microbes in evolution, whether through disease or through other processes such as algal blooms - so-called "red tides" - that can suffocate aquatic animals.

This example and others "suggest that reevaluation may be in order for an untold number of paleoenvironments whose story has been at least partly explained on the basis of the death positions of many of their fossil vertebrates," the authors write in their Paleobiology paper.


'"/>

Contact: Robert Sanders
rsanders@berkeley.edu
510-643-6998
University of California - Berkeley
8-Jun-2007


Page: 1 2 3 4

Related biology news :

1. Pollution causes 40 percent of deaths worldwide, study finds
2. Inflammation may cause preterm labor and fetal deaths
3. Bacteria may not hasten death
4. Study points to new way to predict death risk from torn aorta
5. Ethnicity plays a role in neonatal deaths
6. Antibody retards growth and induces death in liver cancer cells
7. Specific type of cell death may accelerate decompensated heart failure
8. Lung and bladder cancer deaths continue decades after arsenic exposure
9. Cells re-energize to come back from the brink of death
10. Common cancer gene sends death order to tiny killer
11. Parkinsons protein protects neurons from stress induced cell death

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/23/2020)... ... June 22, 2020 , ... The field of quantitation of ... assays (LBA) have dominated this area. However, the use of mass spectrometry in this ... now necessitates the question “How do you choose which approach to use (LBA or ...
(Date:6/19/2020)... ... June 16, 2020 , ... The director of stem cell biotechnology company ... cell medicine and pharmaceutical industries have easier access to stem cell counting, they will ... of this year, Independence Day weekend in the U.S., Asymmetrex is offering free tissue ...
(Date:6/13/2020)... ... 11, 2020 , ... Bode Technology (Bode), a ... genealogy team. Bode’s Forensic Genealogy Service (FGS) continues to deliver investigative ... methods. The team has added experienced genealogists, each having over a decade of ...
Breaking Biology News(10 mins):
(Date:6/19/2020)... ... June 18, 2020 , ... The Vitaspace ... is to join forces to radically prolong life and find a way (medicine or ... period. This project was supported by various scientists from all over the world, doctors, ...
(Date:6/11/2020)... ... 2020 , ... Reducing carbon emissions has been and will continue to be ... market dips, ways to reduce CO2 is something we can’t avoid. , To ... biofuels being produced today are created from recycled cooking oil or crops. Unfortunately, these ...
(Date:5/30/2020)... ... May 29, 2020 , ... The Conference Forum is ... solely dedicated to the unique role of the Chief Medical Officer in the ... responsibilities, problem-solving, best practices and career development of CMOs and Heads of R&D ...
(Date:5/21/2020)... ... May 21, 2020 , ... Threats ... cause long-term harm , Contrary to conventional wisdom that says the coronavirus pandemic ... many companies will emerge from the pandemic commercially weaker, dealing with delays in ...
Breaking Biology Technology:
Cached News: