" European scientists have discovered a 390-million-year-old fossilized claw of giant sea scorpion. The man-sized monster possibly was the ancestor of modern day scorpions and even spiders:

The immense fossilised claw of a 2.5m-long (8ft) sea scorpion has been described by European researchers... The creature, which has been named: Jaekelopterus Rhenaniae, would have paddled in a river or swamp.
The size of the beast suggests that spiders, insects, crabs and similar creatures were much larger in the past than previously thought, the team says.
The claw itself measures 46cm - indicating its owner would have been longer even than the average-sized human."

- Can you imagine if it were alive today, ready to devour unsuspecting swimmers?

xx
Kiki