150-Million-Year-Old Brittle Star Fossilized in the Middle of Cloning Itself
Published on May 15, 2024
To the untrained eye, the ancient brittle star fossil above looks like what you’d expect of a now-especially-brittle echinoderm. But the fossil is quite rare: It captures the moment at which the brittle star was cloning itself, regenerating three of its arms as it died.