This weeks paper, Evolvability and hierarchy in rewired bacterial gene networks, was suggested by Joel Lopez.Randomly changing parts in a machine often breaks it. Intelligent design nuts claim this is also true of living things and that this is somehow evidence

http://blog.lib.umn.edu/denis036/thisweekinevolution/2008/04/gene_networ...

Evolvability and hierarchy in rewired bacterial gene networks. Isalan M (2008) Nature.
Disruption of myoglobin in mice induces multiple compensatory mechanisms. Godecke A. (1999) Proceedings of the National Academy of Sciences.
April 27, 2008