These Huge Scorpions Patrolled the Seas 460 Million Years Ago
![](https://media.wnyc.org/i/800/0/c/85/1/Pentecopterus-Patrick-Lynch-1.jpg)
This illustration shows two adult sea scorpions that lived during the Ordovician period about 460 million years ago.
( Image credit: Patrick Lynch | Yale University )
( Image credit: Patrick Lynch | Yale University )
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