The eyes of the extinct sea scorpion Jaekelopterus rhenaniae have the same structure as the eyes of modern horseshoe crabs (Limulidae). The compound eyes of the giant predator exhibited lens cylinders ...

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 waters ...

Specimens of what appear to be the largest eurypterid species found in Australia could shed light on the sudden extinction of the massive arthropods. By Rebecca Dzombak Most modern scorpions would fit ...

The fossilised remains of a giant claw that once belonged to a sea scorpion roughly 2.5 metres long have been found in Germany. Researchers say the monstrous creature is the largest arthropod ever ...

The extinct sea scorpion species Jaekelopterus rhenaniae had eyes comparable to those of today's horseshoe crabs. The two-and-a-half-meter predator was particularly apt at perceiving contrasts and ...