A new study reveals that 465-million-year-old Ordovician fish fossils possessed dentine-containing bumps used for sensory perception. Researchers used 3D scans to determine these structures functioned similarly to sensilla found in invertebrates like crabs and shrimp. This discovery highlights evolutionary convergence, where unrelated species independently develop similar traits, in this case, sensory organs.

Prepared by Olivia Bennett and reviewed by editorial team.