Darwin evolution going backwards? (Introduction)

by David Turell , Thursday, September 04, 2008, 01:21 (5923 days ago)

New genetic research shows that the flightless birds of the Southern Hemisphere descended from ancestors that flew. Each apparently from a separate species, not the single ancestor that previously was theorized. This appears to be an example of convergence as described by Simon Conway Morris in several different environments in parallel. It also raises the question of what is the advantage by natural selection of birds losing the ability to fly? Look at this website: http://www.eurekalert.org/pub_releases/2008-09/uof-nrc090308.php