UnThreaded | Threaded | Whole Thread (1) | Ignore Thread Prev | Next
Author: bdhinton Big gold star, 5000 posts Old School Fool Add to my Favorite Fools Ignore this person (you won't see their posts anymore) Number: of 24984  
Subject: Behe: more evidence for limits to evolution Date: 1/11/2012 10:27 PM
Post New | Post Reply | Reply Later | Create Poll . Report this Post | Recommend it!
Recommendations: 1
More experimental evidence for limits to Darwinian evolution:

I never thought it would happen but, in my estimation, Richard Lenski has acquired a challenger for the title of "Best Experimental Evolutionary Scientist." Lenski, of course, is the well-known fellow who has been growing E. coli in his lab at Michigan State for 50,000 generations in order to follow its evolutionary progress. His rival is Joseph Thornton of the University of Oregon who, by inferring the sequences of ancient proteins and then constructing (he calls it "resurrecting") their genes in his lab, is able to characterize the properties of the ancestral proteins and discern how they may have evolved into more modern versions with different properties.

I have written appreciatively about both Lenski and Thornton before, whose work indicates clear limits to Darwinian evolution (although they themselves operate within a Darwinian framework). Thornton's latest work is beginning to show a convergence with Lenski's that greatly boosts our confidence that they both are on the right track. In a recent review (Behe, 2010) I pointed out that all characterized advantageous mutations that Richard Lenski has observed in his twenty-year experiment have turned out to be degradative ones -- in which a gene or genetic control structure was either destroyed or rendered less effective. Random mutation is superb at degrading genetic material, which sometimes is helpful to an organism. In his latest work Thornton, too, shows evolution of a system by degradation, although he speculates that the changes were neutral rather than advantageous.


http://www.evolutionnews.org/2012/01/a_blind_man_car055021.h...
Post New | Post Reply | Reply Later | Create Poll . Report this Post | Recommend it!
Print the post  
UnThreaded | Threaded | Whole Thread (1) | Ignore Thread Prev | Next

Announcements

Post of the Day:
Berkshire Hathaway

Is the Market Overvalued?
What was Your Dumbest Investment?
Share it with us -- and learn from others' stories of flubs.
When Life Gives You Lemons
We all have had hardships and made poor decisions. The important thing is how we respond and grow. Read the story of a Fool who started from nothing, and looks to gain everything.
Community Home
Speak Your Mind, Start Your Blog, Rate Your Stocks

Community Team Fools - who are those TMF's?
Contact Us
Contact Customer Service and other Fool departments here.
Work for Fools?
Winner of the Washingtonian great places to work, and "#1 Media Company to Work For" (BusinessInsider 2011)! Have access to all of TMF's online and email products for FREE, and be paid for your contributions to TMF! Click the link and start your Fool career.
Advertisement