@WFS,World Fossil Society,Riffin T Sajeev,Russel T Sajeev Sponges may be simple creatures, but they basically ruled the world some 445 million years ago, after the Ordovician mass extinction, a new study finds. Roughly 85 percent of all species died in the Ordovician mass extinction, the first of the world’s five known mass extinctions. (The other […]