Be glad our species wasn’t around some 400 million years ago…we would have had to contend with giant sea scorpions, some more than 10 feet in length and capable of prowling about on land in search of a meal. And that’s not all: Researchers reveal that at least one of these Monsters of Deep Time had a particularly violent — and unusual — way of dispatching its prey.

Published today in The American Naturalist, the spine-tingling tale of a stabby sea scorpion is straight out of an old-sc