Excerpts: Genes that have allowed brains to become larger and more complicated have been found and cloned (...).
One of the genes has been guiding the formation of nervous systems since the first fishlike animals with backbones appeared on Earth. The other evolved about the time that the brains of these vertebrates got larger than those of birds.
In the discovery process, neuroscientists were surprised to learn that their theory about how central nervous systems (brains, spines, and eyes) develop in everything from mice to humans was wrong.
- Genes For A Better Brain Found: Discovery Surprises Neuroscientists, William J. Cromie, Harvard University Gazette, 02/05/09