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A 6-foot-long 'sea scorpion' swam and scuttled in ancient seas

A 6-foot-long 'sea scorpion' swam and scuttled in ancient seas

Scientists have found evidence of a giant scorpion-like animal that roamed the seas hundreds of millions of years before the dinosaurs. The research team named the newly discovered creature Pentecopterus decorahenis because it looks like early Greek warships known as penteconters. "Decorahenis" is a reference to Decorah, Iowa, near where the fossils were found. Pentecopterus lived about 450 million years ago. It is the earliest known member of an extinct group of animals known as eurypterids that are related to hermit crabs, spiders and scorpions.  Most eurypterids of that time were relatively small -- about 2 inches long -- but not this one. Paleontologists...

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