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For over a century, the Cambrian arthropod Helmetia expansa remained a mystery. Discovered by paleontologist Charles ...
For over a century, the Cambrian arthropod Helmetia expansa remained a mystery. Discovered by paleontologist Charles Doolittle Walcott in 1918, it was ...
Experts, including Canadian evolutionary biologist Ashley Reynolds, believes these pups produced by Colossal Biosciences ...
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