Adaptations

Summary of Concepts and Discoveries

  • The “Golden Age” of shark evolution featured an incredible diversity in cartilaginous fish.
  • This era included ancestors of modern sharks, rays, and chimaeras such as the ratfish.
  • A notable clip discusses how ancient sharks lost their buzzsaws, anvils, and spikes.

References

Clip title: How Sharks Lost Their Buzzsaws, Anvils, and Spikes Author / channel: pbs-eons URL: https://www.youtube.com/watch?v=4ihYiTOIBT0

2026 04 10 The Golden Age of Shark Evolution and Bizarre Adaptations