Story perspectives

Ancient Sharks: Bottom-Dwellers Evolve Amid Climate Shifts

9/9/2025

Summary

Story summary

A study shows ancient sharks, over 400 million years old, were mainly bottom-dwellers, unlike today's species.
Researchers analyzed illustrations of 400 shark species to estimate ancient body shapes due to limited fossil records.
Pelagic sharks resembling modern predators appeared in the Jurassic period, marking an evolutionary shift linked to habitat changes.
Climate changes, like rising sea levels, enabled sharks to adapt to open waters.
Insights into ancient shark ecosystems can help predict current species' responses to climate change.

1 of 1

Story summary

A study shows ancient sharks, over 400 million years old, were mainly bottom-dwellers, unlike today's species.
Researchers analyzed illustrations of 400 shark species to estimate ancient body shapes due to limited fossil records.
Pelagic sharks resembling modern predators appeared in the Jurassic period, marking an evolutionary shift linked to habitat changes.
Climate changes, like rising sea levels, enabled sharks to adapt to open waters.
Insights into ancient shark ecosystems can help predict current species' responses to climate change.