Megan Scudellari | Jun 22, 2010 | 3 min read
The vertebrate transition from fin to limb is one of the juiciest mysteries in evolutionary biology, and this week, scientists may have identified another clue to the puzzle. Published online today (June 23) at linkurl:Nature,;http://www.nature.com/nature/index.html a team of researchers describe two previously unknown proteins essential to fin development in bony fishes -- the loss of which may have been a key step in the evolution of fins to limbs during tetrapod development. "It's a very exc