Brittle star fossils provide insights into when, how and why major evolutionary change occurs in Earth history
Published 14 January 2022 An artistic reconstruction of Ophiopetagno paicei from the Silurian of Gotland, Sweden. Painting by Joe Petagno. Present-day biodiversity is the result of millions of years of evolutionary change. Although we can trace back in time most of the major organismal groups using fossils, the very origin of these clades is generally deemed impossible to grasp, hampering our unde