The availability of prey and the ability to adapt to changing environments played key roles in the evolution of sharks. A new study, in which over 3,000 shark teeth were analysed, provides new insight into how modern shark communities were established. The results are published in the journal Current Biology.
The new research investigated the diversity of shark teeth from the final stages of the Mesozoic (approximately 80 million years ago) to the present day. In particular, it sought to understand why there are only 15 species of mackerel sharks living today (scientific name: Lamniformes), whereas there are more than