
Scientists at Harvard Medical School have discovered that a gene that regulates bone and muscle growth may also be involved in brain development and activity in primates, including humans. In particular, this gene appears to be active in areas of the brain involved in cognition and learning. Their finding were published yesterday in Nature.
This is a good example of how genes can be used by the evolutionary process for new functions, and, because this particular retooled gene is only found in primates, it suggests that the repurposing occurred in a common ancestor of this clade.