Around 400 million years ago, Earth’s oceans were dominated by massive sea scorpions. Scorpions, as we know them today, are ...

As far as arachnids go, a creepy new species of assassin spider in Australia seems to be par for the course. However, these creatures used to be much bigger. Long before T-Rex debuted, ancient ...

Still, next to nothing is known about most local scorpion species. During the Paleozoic Era, giant sea scorpions would have been the equivalent of a great white shark in their food web.

Previous reef-builders such as bryozoans were joined by corals and prehistoric sponges known ... food chain were the fearsome eurypterids, or sea scorpions. Some species grew to more than six ...