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Home > Collège de France (Général) > Conférence - Neil Shubin : The Evolutionary Origins of Bones and Teeth


	Podcast:		Collège de France (Général)
	Episode:		Conférence - Neil Shubin : The Evolutionary Origins of Bones and Teeth
	Category:		Education
	Duration:		00:46:24
	Publish Date:		2025-10-29 21:10:00
	Description:		Denis Duboule Chaire Évolution du développement et des génomes Collège de France Année 2025-2026 Nos ancêtres les poissons Conférence - Neil Shubin : The Evolutionary Origins of Bones and Teeth Neil Shubin Université de Chicago, Président élu de l'Académie nationale des sciences (NAS), États-Unis Résumé Teeth 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 bony exoskeletons of our jawless fish ancestors. Inside this exoskeletal armor are small structures that are distinctly toothlike. Detailed comparisons of these features among living and fossil vertebrates and invertebrates reveal that the earliest teeth likely had a sensory function in the external tissues of these fish. Assessing diverse fossil fish reveals that many distinct features of our bones and teeth, such as the capacity to remodel, originally came about in jawless fish.
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