Praearcturus gigas was a meter-long Devonian scorpion whose size may reflect a world with few large competitors rather than high oxygen alone. Long before forests covered the land and when animals were only beginning to venture out of the oceans, a giant scorpion the size of a small coffee table prowled ancient landscapes. Now, researchers … Continue reading A Giant Scorpion the Size of a Coffee Table Is Forcing Scientists To Rethink Evolution