Emma Bernard, a curator of fossil fish at the Museum, says, 'Shark-like scales from the Late Ordovician have been found ... As there are no fossils of these animals from this period of time, this is ...

Researchers have uncovered a golden-colored, 450-million-year-old fossil of a new arthropod species, preserved in fool’s gold ...

Almost all the previous examples are from the Cambrian period ... was evolving at that time. "It coincides with the 'great Ordovician biodiversification event', when animals with hard skeletons ...