Ancient armored fish revises early history of jaws
Placoderm fossil had skull bones like those of many modern vertebrates
![placoderm illustration](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/10/101916_MR_placoderm_main.jpg?fit=860%2C460&ssl=1)
FISHFACE A 423-million-year-old armored fish from China had jaws that resemble those of modern land vertebrates and bony fish.
Dinghua Yang