Origin of bird flight

[John Conway <john.a.conway@gmail.com>]

Alain Beneteau has a new theory on the origin of avian flight, which I 
think makes a lot of sense. You can forget your trees down, ground up, 
and even your precious wing assisted incline running theories - this 
one's the winner:

http://www.deviantart.com/deviation/40525732/