which dates back to the middle of the Silurian period (about 420 million to 443 million years ago). The fossils were so fragile that the scientists couldn’t simply split the stones in half ...

Now, that treasure trove includes two extraordinary fossils whimsically named Punk ferox and Emo vorticaudum. These ancient mollusks, discovered in the Silurian Herefordshire Lagerstätte ...