Ancient Penguin DNA Raises Doubts About Accuracy of Genetic Dating Techniques

This ScienceDaily article demonstrates the strengths of the Scientific Method compared to other ways of acquiring knowledge. Reasonable people agree that reassessing knowledge with new information is necessary and is a good thing.
ScienceDaily (Nov. 15, 2009)

Penguins that died 44,000 years ago in Antarctica have provided extraordinary frozen DNA samples that challenge the accuracy of traditional genetic aging measurements, and suggest those approaches have been routinely underestimating the age of many specimens by 200 to 600 percent.

Summary
A certain method of genetic dating techniques is used as a standard. There was evidence to suggest that it was flawed. New information and evidence has been discovered to support previous evidence suggesting that the method was flawed. Now the method is being reassessed with regard to the new evidence. It also necessitates reassessing any conclusions that were made using that technique.

Reassessing Knowledge With New Information is a Good Thing
The benefit is that reassessing conclusions in light of new information get us closer to a better understanding of our world and to making better decisions.