Over 500 million years ago, a small marine creature swam through Cambrian waters. Its name: Mollisonia symmetrica. Long thought to be a distant relative of modern horseshoe crabs, new research now ...

A new analysis of an exquisitely preserved fossil that lived half a billion years ago suggests that arachnids—spiders and their close kin—evolved in the ocean, challenging the widely held belief that ...

A spider fossil from northeastern China is so exquisitely preserved that it reads like a field notebook from deep time, capturing delicate anatomy that usually vanishes long before rock hardens. I see ...

A set of fossilized footprints discovered in northern Arizona has revealed the silent journey of a prehistoric arachnid that walked the Earth around 260 million years ago. Preserved in stone, these ...

Fossil of ancient spider web only one of its type ever discovered Researchers have found what they say is the only fossil ever discovered of a spider attack on prey caught in its web — a 100 ...

WASHINGTON - If you are not a fan of spiders, you may not like the creepy little arachnid scientists found entombed in chunks of amber from northern Myanmar. Unlike its spider cousins alive today, ...