Spiders and scorpions have ruled as terrestrial predators for 400 million years, with their success often attributed to ...

Over 500 million years ago, a small marine creature swam through Cambrian waters. Its name: Mollisonia symmetrica. Long ...

A new analysis of an exquisitely preserved fossil that lived half a billion years ago suggests that arachnids—spiders and ...

A side-by-side comparison of the brains of a horseshoe crab (left), the Mollisonia fossil (center) and a modern spider (right) reveal the surprising findings of this study: The organization of ...

Finely preserved brain features in a tiny fossil suggest that spiders and their kin may have first evolved in the ocean ...