Not just that, but they still have the genes for teeth.
Quote: All birds have a gene that deactivates the formation of teeth (yep, birds can grow teeth, we’ll get to that in a minute). The researchers, from the University of California, Riverside, found that this gene can be traced back to a common ancestor of all modern birds, which lived some 100 million years ago.
"Well, evolution is a theory. It is also a fact. And facts and theories are different things, not rungs in a hierarchy of increasing certainty. Facts are the world's data. Theories are structures of ideas that explain and interpret facts. Facts don't go away when scientists debate rival theories to explain them. Einstein's theory of gravitation replaced Newton's in this century, but apples didn't suspend themselves in midair, pending the outcome. And humans evolved from ape- like ancestors whether they did so by Darwin's proposed mechanism or by some other yet to be discovered."
-Stephen Jay Gould
-Stephen Jay Gould
