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Ancient Marine Creature Reveals Spiders' Surprising Evolutionary Roots

7/23/2025

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Summary

Story summary

A groundbreaking study in *Current Biology* uncovers that the ancient marine creature Mollisonia symmetrica, dating back 500 million years, shares a brain structure with modern spiders. This revelation suggests that arachnids may have evolved in ocean depths rather than on land, reshaping our understanding of their complex evolutionary journey.

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Story summary

A groundbreaking study in *Current Biology* uncovers that the ancient marine creature Mollisonia symmetrica, dating back 500 million years, shares a brain structure with modern spiders. This revelation suggests that arachnids may have evolved in ocean depths rather than on land, reshaping our understanding of their complex evolutionary journey.