Collège De France (général)

Denis DubouleChaire Évolution du développement et des génomesCollège de FranceAnnée 2025-2026Nos ancêtres les poissonsConférence - Neil Shubin : The Evolutionary Origins of Bones and TeethNeil ShubinUniversité de Chicago, Président élu de l'Académie nationale des sciences (NAS), États-UnisRésuméTeeth and bones are fundamental features of vertebrate organisms. The earliest vertebrates date from fossils that are over 500 million years old and existed at the time of the Cambrian Explosion, a great burst of innovation in the evolutionary history. The first creatures with tissues similar to our teeth and bones aren't seen until tens of millions of years later. Some of these reports have been controversial because challenges imaging the fossils and comparing the tissues between fossil and living forms. New imaging technologies have transformed our ability to study this issue. Studies from multiple laboratories have revealed that tissues equivalent to our teeth and bones originally evolved outside the body—in the bo