HOME >> BIOLOGY >> NEWS
Scientist says ostrich study confirms bird 'hands' unlike those of dinosaurs

CHAPEL HILL -- To make an omelet, you need to break some eggs. Not nearly so well known is that breaking eggs also can lead to new information about the evolution of birds and dinosaurs, a topic of hot debate among leading biologists.

Drs. Alan Feduccia and Julie Nowicki of the University of North Carolina at Chapel Hill have done just that. They opened a series of live ostrich eggs at various stages of development and found what they believe is proof that birds could not have descended from dinosaurs. They also discovered the first concrete evidence of a thumb in birds.

"Whatever the ancestor of birds was, it must have had five fingers, not the three-fingered hand of theropod dinosaurs," Feduccia said. "Scientists agree that dinosaurs developed 'hands' with digits one, two and three -- which are the same as the thumb, index and middle fingers of humans -- because digits four and five remain as vestiges or tiny bumps on early dinosaur skeletons. Apparently many dinosaurs developed very specialized, almost unique 'hands' for grasping and raking. "Our studies of ostrich embryos, however, showed conclusively that in birds, only digits two, three and four, which correspond to the human index, middle and ring fingers, develop, and we have pictures to prove it," said Feduccia, professor and former chair of biology at UNC. "This creates a new problem for those who insist that dinosaurs were ancestors of modern birds. How can a bird hand, for example, with digits two, three and four evolve from a dinosaur hand that has only digits one, two and three? That would be almost impossible."

A report on their investigations will appear online in the August issue of Naturwissenschaften, the top German biology journal, and soon afterwards in the print edition.

The new work involved microscopic examination of early skeletal development in ostrich embryos, he said. Nowicki, who received her doctorate in biology at UNC last year, and he found the critical per
'"/>

Contact: Deb Saine
919-962-8415
University of North Carolina at Chapel Hill
14-Aug-2002


Page: 1 2 3

Related biology news :

1. Scientists to prototype cyberinfrastructure for research and education access to ocean observatories
2. Scientists sequence genome of kind of organism central to biospheres carbon cycle
3. Scientists find nanowires capable of detecting individual viruses
4. Scientists discover potential new way to control drug-resistant bacteria
5. Scientists explore genome of methane-breathing microbe
6. Scientists decipher genetic code of biothreat pathogen
7. Stuck on you: Scientists lay bare secrets of bacterial attachment proteins
8. Scientists discover proteins involved in spread of HIV-1 infection
9. Scientists fear new Ebola outbreak may explain sudden gorilla disappearance
10. Scientists reinvent DNA as template to produce organic molecules
11. Scientists visualise cellular handmaiden that restores shape to proteins

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


(Date:9/12/2018)... ... September 11, 2018 , ... Tennant Coatings, manufacturer of cutting ... line of high performance secondary containment coatings, designed to protect substrates in some ... elite certified installers with the needed solutions to protect facility’s critical infrastructure and ...
(Date:9/12/2018)... ... 2018 , ... Captiva Spine, Inc., which designs, manufactures and ... clearance from the U.S. Food and Drug Administration (FDA) to market TowerLOX-EXT® MIS ... MIS Extended Tab Pedicle Screws provide the narrow insertion of an extended tab ...
(Date:9/7/2018)... ... September 06, 2018 , ... ... and sister to show Sensors Expo & Conference , announces their ... University, CA to conduct an IoT Enabled Industrial IoT Certification Program. Taking place ...
Breaking Biology News(10 mins):
(Date:8/26/2018)... ... August 24, 2018 , ... ExoCoBio Inc., ... dramatically relieves atopic dermatitis and inhibits a variety of inflammatory targets in the ... the symptoms of mice having severe atopic dermatitis were significantly improved after administration ...
(Date:8/21/2018)... ... 2018 , ... The Connecticut Technology Council (CTC) and Marcum LLP today announce ... companies in Connecticut. This year’s group of top-ranked companies will be honored at the ... Convention Center in Hartford. A complete list of the Marcum Tech Top 40 is ...
(Date:8/17/2018)... ... August 17, 2018 , ... VANCOUVER, British ... Repositories (ISBER) is pleased to announce the release of the Russian translation of ... released in January 2018, is a practice-changing publication aimed at advancing the science ...
(Date:8/11/2018)... ... 2018 , ... Researchers performing pressurized NMR or EPR experiments face a danger ... for High-Pressure NMR & EPR by Wilmad-LabGlass – SP Scienceware shields researchers from ... High-pressure experiments have significantly grown in popularity over the last several years. As a ...
Breaking Biology Technology:
Cached News: