Footnote
a The fossil feather is from archaeopteryx, an extinct creature sometimes presented as a “missing link” in the line of descent to modern birds. Most paleontologists, however, no longer consider it an ancestor of modern birds.
a The fossil feather is from archaeopteryx, an extinct creature sometimes presented as a “missing link” in the line of descent to modern birds. Most paleontologists, however, no longer consider it an ancestor of modern birds.