Five-Foot-Long Scorpion

…'fantastically preserved' fossils of the largest and oldest species of sea scorpion… unearthed in Iowa. Dating back 460 million years, the eurypterid species would have measured more than 5ft (1.5 metres) long and had unique 'paddle-shaped' legs to help it swim and dig. … bizarre shape resembles that of the Greek warship penteconter, and the species has been described as 'Pentecopterus decorahensis'. …