There's a lot of hot air flying round (heh heh) about the origin of flight. Some of them less comical than others.
Here's one of the better ones: http://www.biology-online.org/biology-forum/
Did you know flight 'evolved' FOUR separate and distinct times?
Each one of these is an entirely distinct and completely different to the others.
The wings are totally different, and formed in completely different ways:
Bat wings are fromed from the FINGERS of the forelimb:http://www.ucmp.berkeley.edu/vertebrate ... atwing.gif
Bird wings are formed from feathers growing on the whole of the forelimb:http://www.ucmp.berkeley.edu/vertebrate ... /aves.html
Insects are a law unto themselves, and very often have 2 pairs of wings:http://upload.wikimedia.org/wikipedia/c ... t_edit.jpg
Pterosaurs have wings formed from the elongation of the little finger!http://www.ucmp.berkeley.edu/vertebrate ... urwing.gif
It's all really wonderful.
Now here's the really scientific bit:
How did all this evolve?
Your guess is as good as anybody's!
Last edited by Asyncritus
on Thu Nov 19, 2009 11:51 pm, edited 2 times in total.