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And the study's author of this new study in the 2022 research, they looked at some very different methods in the study and exposed shark teeth to less citizen environments. Additionally, the species of sharks examined likely makes a big difference. So portiaxoid shark teeth are less exposed to ambient water than those of black-tipped reef sharks and have a different anatomy. Which sharks were best for at least cholera-changing seas? Nobody really knows right now. And more research is needed to see how the single experiment of 16 of these teeth might relate to the real world.