Praearcturus gigas confirmed as largest known scorpion at over 3 feet long, 415 million years ago

A new analysis of museum specimens has settled decades of debate: Praearcturus gigas was a giant scorpion, not an isopod crustacean as some had proposed. The creature lived 415 million years ago and stretched more than three feet (over 90 cm) in length, making it the largest known scorpion. The finding reshapes understanding of prehistoric arachnid diversity.