Paleontologists in Mongolia have found the fossilized remains of Minjinia turgenensis, a new genus and species of placoderm fish that lived 410 million years ago (Early Devonian epoch). They’ve examined a partial braincase and skull roof of Minjinia turgenensis and found extensive endochondral bone, the hard bone that makes up our skeleton after birth. This discovery suggests the lighter skeletons of sharks may have evolved from bony ancestors,...
