Giant 'swimming head' creature lived in our oceans 500 million years ago
CNN
Researchers have uncovered the fossil of an unusual creature that was likely a giant compared to tiny ocean life 500 million years ago.
Radiodonts, a group of primitive arthropods, were widespread after the Cambrian explosion event 541 million years ago -- a time when a multitude of organisms suddenly appeared on Earth, based on the fossil record.More Related News
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