Quoted: “Our data suggest that the environment was changing before the asteroid impact,” said Benjamin Linzmeier, the study’s first author, said in a statement. “Shells grow quickly and change with water chemistry,” Linzmeier, a postdoctoral geoscientist at the University of Wisconsin-Madison, said in a statement. “Because they live for such a short period of time, each shell is a short, preserved snapshot of the ocean’s chemistry.”
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