Ancient sea urchins reveal a tale of resilience in the face of catastrophe 104 million years ago.
To uncover these secrets of the deep, the research team meticulously examined over 1,400 sediment samples extracted from boreholes in the Pacific, Atlantic, and Southern Oceans, representing former water depths.
Additionally, they scrutinized the thickness of around 170 spines from two distinct time periods. These measurements indicated the total mass of sea urchins in their deep-sea habitat, effectively quantifying their biomass from ancient times to the present. This event also cast a shadow on the deep sea, resulting in significant disturbances. The spines, once thick and diverse in shape, bore the marks of change, becoming thinner and less varied after the cataclysmic event.
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