New research shows spiders didn’t come from the Earth’s land habitats as once believed but originated in ancient seas.

A new study suggests spiders may have ancient marine origins. Researchers analyzed a 500-million-year-old fossil, Mollisonia ...

A 500 million-year-old fossil with a spider's brain structure suggests that arachnids may have evolved in the oceans.

University of Arizona researchers reviewed an "exquisitely preserved" fossil of Mollisonia symmetrica that supports the idea ...

A fossilized brain from a 500-million-year-old sea creature shows unexpected spider-like features, hinting that spiders and ...

Half a billion years ago, a strange sea-dwelling creature called Mollisonia symmetrica may have paved the way for modern ...

One of the creepiest, crawliest creatures of the Earth may have been swimming before adapting to live on land, new research suggests.

Spiders and their arachnid relatives may have actually originated in the sea, according to analysis of an "exquisitely ...

A remarkably well-preserved fossil is challenging what scientists thought they knew about the origins of spiders and their ...

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

Learn how a fossil from approximately 500 million years ago traces the evolutionary origins of spiders, scorpions, and other ...