Getting Down and Dirty with Placodermi
A class of prehistoric fish, which has been extinct since the end of the Devonian Period more than 380 million years ago, has recently grabbed the attention of scientists, who haveВ called the animalВ a sexual trailblazer.В Placoderms — armor-plated fish — were once considered noteworthy because they were among the first creatures on Earth with a … Read more