Fish fins and mouse feet controlled by the same ancient genetic switch | Not Exactly Rocket Science | Discover Magazine

"Whenever you pick up a book or take a step, you’re relying on a genetic legacy that’s been handed down since your ancestors swam about in prehistoric oceans. Your hands and feet– intricate bundles of bones and muscle – are your versions of the fins of fish. They may look very different, but they were sculpted from embryonic flesh using similar genetic programmes." Read More