Scientists Identify The World's Biggest Known Scorpion, The Size of a Dog

Key Points:

• Researchers in the UK have confirmed that Praearcturus gigas, a giant arthropod from 415 million years ago, is likely the largest known scorpion in history, measuring over a meter in length.
• Fossils first discovered in 1870 were reexamined using advanced imaging techniques, settling long-standing debates about the creature's identity and revealing features such as large pincers and ridged limbs used for sound production.
• Praearcturus lived during the Early Devonian period when life was just beginning to colonize land, and it likely dominated its environment due to a lack of other large predators, spending time both on land and in water.
• The study provides insights into the early evolution of terrestrial animals, showing how scorpions and related arachnids might have transitioned between aquatic and terrestrial habitats.
• These findings contribute to understanding the timeline of animal land colonization and the evolutionary history of scorpions, with implications for the study of ancient ecosystems and species diversification.