415 million years ago, giant scorpions the size of a Golden Retreiver prowled Britain — and its story is now rewriting prehistoric history

Scientists identified Praearcturus gigas as the largest known scorpion, measuring one meter long. This ancient predator lived approximately 415 million years ago during the Early Devonian period. Researchers re-examined museum fossils, revealing new details about its anatomy and lifestyle. The discovery challenges previous explanations for giant arthropod sizes. This finding highlights the ongoing scientific value of historical museum collections.