Eurypterids, better known as sea scorpions, used their serrated-spine-tipped tails to dispatch their prey, according to new research by University of Alberta paleontologists Scott Persons and John Acorn. This illustration shows a sea scorpion attacking an early vertebrate. Image credit: Nathan Rogers. Sea scorpions are an extinct group of aquatic arthropods that are ancestors of modern spiders, lobsters, and ticks. The group is taxonomically diverse,...
