First Jaws? Ancient Creature Sported One Scary Mouth
When you purchase through links on our site , we may earn an affiliate commission . Here ’s how it works . Strange fusion of tooth - traverse lips , tongues and throat in ancient eel - shaped creatures might break how jaw acquire , investigator now suggest . The origin of jaw remains mostly an enigma . To solve this enigma , scientists analyzejawless vertebrates(animals with backbones ) both animation and fossil ....