#Login Register


  • 6 Vote(s) - 3.33 Average
Home 


Ancient feathered birds may have sported four wings
Lisa Boxx Show this Post
03-15-2013, 12:50 AM #1
Lisa Boxx Incognito Anonymous
 
Some of the earliest birds hailing from the age of the dinosaurs may have sported four flying limbs, a team of Chinese researchers says.

If so, 11 fossils from the lower Cretaceous period, about 120 million years ago, could represent a missing link in the development of modern birds, according to a new paper released Thursday by the journal Science.

Modern birds generally work with two wings, using small, clawed hind legs for ground travel. A few, like the golden eagle, have fuzzy down on their back limbs, which is for insulating their appendages, not flying. Though researchers have unearthed evidence of downy limbs in feathered dinosaurs, little evidence existed that early birds were using those hind legs for flapping.

But 11 specimens from Liaoning in northeastern China, from several species show evidence of long, stiff feathers with curved shafts jutting out nearly perpendicular to the leg -- a far cry from mere insulation.

The feathers were arranged in a relatively wide, flat plane, making it a potentially flight-worthy design, says a team of Chinese scientists studying feathered fossils.

"These features suggest that the metatarsal feathers were aerodynamic in function, providing lift, creating drag, and/or enhancing maneuverability, and thus played a role in flight," the authors wrote.

It's possible the four-wing model was used early in birds' development before evolving into the more aerodynamic two-wing formula.

Read More: http://www.latimes.com/news/science/scie...7883.story



Home 




 



DISCLAIMER / Terms of Service (TOS):
Kritterbox.com - Socialize anonymously, commentary, discussion, oddities, technology, music and more!  This website is provided "as is" without warranty of any kind, either expressed or implied. kritterbox.com shall not be liable for any damages whatsoever, including, without limitation, those resulting from loss of use, data or profits, whether or not advised of the possibility of damage, and on any theory of liability, arising out of or in connection with the use or performance of this site or other documents which are referenced by or linked to this site.
This website exists solely for the purposes of exchange of information, communication and general entertainment. Opinions from posters are in no way endorsed by kritterbox.com. All posts on this website are the opinion of the authors and are not to be taken as statements of fact on behalf of kritterbox.com. This site may contain coarse language or other material that kritterbox.com is in no way responsible for. Material deemed to be offensive or pornographic at the discretion of kritterbox.com shall be removed. kritterbox.com reserves the right to modify, or remove posts and user accounts on this website at our discretion. kritterbox.com disclaims all liability for damages incurred directly or indirectly as a result of any material on this website. Fictitious posts and any similarity to any person living or dead is coincidental.
All users shall limit the insertion of any and all copyrighted material to portions of the article that are relevant to the point being made, with no more than 50%, and preferably less of the original source material. A link shall be visible in text format, embedded directly to the original source material without exception.
No third party links, i.e. blogs or forums will be accepted under any circumstances, and will be edited by staff in order to reflect the original source of copyrighted material, or be removed at the sole discretion of kritterbox.com.
Fair Use Notice:
This site may contain copyrighted material the use of which has not always been specifically authorized by the copyright owner. Users may make such material available in an effort to advance awareness and understanding of issues relating to economics, individual rights, international affairs, liberty, science, and technology. This constitutes a 'fair use' of any such copyrighted material as provided for in section 107 of the US Copyright Law. In accordance with Title 17 U.S.C.Section 107, the material on this site is distributed without profit to those who have expressed a prior interest in receiving the included information for educational and/or research purposes.
This Disclaimer is subject to change at any time at our discretion.
Copyright © 2011 - 2017 kritterbox.com