The Crinoidea, a class of marine echinoderms, have long captivated palaeontologists as one of the most enduring and diverse components of the marine fossil record. Their evolutionary history spans ...
About 66 million years ago, just before the mass extinction that wiped out the dinosaurs, a fish chewed up and spit out some sea creatures. Unbeknownst to that fish, its rejected meal was preserved in ...
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