United KingdomAn international research team led by the University of Tartu discovered that around 470 million years ago, marine animals first began using empty mollusk shells as habitats, marking a significant ecological shift. This development created a new ecological niche and contributed to the evolution of complex marine ecosystems. Fossil analysis showed that during the Cambrian period, such shells remained largely unoccupied, but by the Middle Ordovician, small organisms like bryozoans and graptolites started inhabiting them. The study highlights how shell morphology affected the diversity and size of the organisms that could thrive inside, with nautiloid shells providing better water circulation and thus supporting more varied communities. The emergence of this behavior coincided with a surge in Ordovician biodiversity, suggesting a link between environmental changes and evolutionary adaptations.
Bias read (Center): The article presents scientific findings without overt ideological framing. It focuses on biological and ecological developments, using neutral language and citing academic research without partisan emphasis.
