An extinct marine predator entombed in a seafloor "Pompeii" for 520 million years had a sophisticated heart and blood vessel system similar to those of its distant modern relatives, arthropods such as spiders, lobsters and millipedes.
An extinct marine predator entombed in a seafloor "Pompeii" for 520 million years had a sophisticated heart and blood vessel system similar to those of its distant modern relatives, arthropods such as spiders, lobsters and millipedes.
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