In a twist worthy of a detective novel, a long-misidentified fossil at Harvard's Museum of Comparative Zoology (MCZ) has ...

A 500-million-year-old sea creature called Mollisonia shared a similar brain structure to modern spiders, suggesting that ...

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

The tiny 'backward' brain of an ancient sea creature hints that spider ancestors might have gotten their start in the ocean.