Placodermi

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. 380 million years ago, fish use to have a set of pearly white teeth! Scientific researchers have brought up evidence showing that several specimens of an ancient fish species referred to as the placoderms possess teeth. The scientists have mentioned that their findings can help science to progress in understanding the origins of teeth and jaws in animals. Indeed, the development of jaws and teeth are scientifically thought to be a pre-requisite for the evolution of vertebrates like fish, birds, amphibians, reptiles and even human beings. More importantly, various researchers have advanced that the fact that placoderms were armed with teeth which were covered in plates of bony armour, can indicate that the latter were top predators who used to rule the oceans for more than 70 million years. For instance, science have exposed strong truths demonstrating that the world of vertebrates is ruled by those who have teeth and jaws...