1
   

Theory of Flightless Birds Shot Down

 
 
Reply Tue 9 Sep, 2008 04:35 am
Theory of Flightless Birds Shot Down

Quote:
Ostriches, emus, kiwis and other winged non-flyers might seem to be birds of a feather, sharing similar evolutionary origins, but the story could turn out to be much weirder, with perhaps numerous flying ancestors.
 
farmerman
 
  3  
Reply Tue 9 Sep, 2008 03:59 pm
I dont think that these guys have considered that genetics doesnt "Determine evolutionary pathways" it merely records the changes. Besides, epigenetic variation hasnt been considered. Scoby ducks , pekin ducks, Indian runners, and mallards have virtually similr genetic makeup, yet only mallards fly. AND, they all are variants of one mother duck(er)
ebrown p
 
  2  
Reply Wed 10 Sep, 2008 03:48 am
@farmerman,
How do you shoot down a flightless bird?
OmSigDAVID
 
  1  
Reply Wed 10 Sep, 2008 05:45 am
I woud not
0 Replies
 
farmerman
 
  1  
Reply Mon 15 Sep, 2008 05:12 am
@ebrown p,
I think that this is an example of overenthusiastic science reporting. There are several facts that dont hang with the "shot down" position.
The fact that Ratites all originate from those islands and continents which are in the chain of the breakup of Gondwana, and the fact that they DO have their major genic complements arranged in a kind of geographic order, to me, suggests that the founder population of flying birds had successfully migrated to the splitting islands and continents and evolved from a common rootstock with convergence as an evolutionary adaptation. Remember, the thing that ws common to the SOuthern Hemisphere was that it took several tens of millions of years to evolve newer terminal carnivores so the entire southern hemisphere was "open" for colonization.
0 Replies
 
 

Related Topics

New Propulsion, the "EM Drive" - Question by TomTomBinks
The Science Thread - Discussion by Wilso
Why do people deny evolution? - Question by JimmyJ
Are we alone in the universe? - Discussion by Jpsy
Fake Science Journals - Discussion by rosborne979
Controvertial "Proof" of Multiverse! - Discussion by littlek
 
  1. Forums
  2. » Theory of Flightless Birds Shot Down
Copyright © 2019 MadLab, LLC :: Terms of Service :: Privacy Policy :: Page generated in 0.03 seconds on 08/20/2019 at 08:33:10