Fossils of a tiny sea creature that died more than half a billion years ago may compel a science textbook rewrite of how brains evolved. A study published in Science – led by Nicholas Strausfeld, a ...

Spiders originated in the sea half a billion years ago, suggests a new study. Finely preserved brain features in a tiny marine arthropod fossil suggest that arachnids – spiders and their close kin – ...

Half a billion years ago, a feisty predator flapped around the primordial seas, hooking prey into its mouth while breathing through long gills on its butt. Researchers recently discovered this 506 ...

Discoveries at a major new fossil site in Morocco suggest giant arthropods—relatives of modern creatures including shrimps, insects and spiders—dominated the seas 470 million years ago. Early evidence ...

Add Yahoo as a preferred source to see more of our stories on Google. The fossil of the Cambrian Period marine arthropod Fuxianhuiid, with gut preserved, discovered in Hunan province in southern China ...

Trilobites, extinct marine arthropods that roamed the world's oceans from about 520 million years ago until they went extinct 250 million years ago at the end of the Permian period, may have grown in ...

An international collaboration featuring the University of Vienna and the University of Wisconsin-Madison (USA) has led to the first-ever chromosome-level genome assembly of a sea spider (Pycnogonum ...

No backside, no problem for some young sea spiders. The creatures can regenerate nearly complete parts of their bottom halves — including muscles, reproductive organs and the anus — or make do without ...

Learn how a fossil from approximately 500 million years ago traces the evolutionary origins of spiders, scorpions, and other arachnids to a surprising place: the sea. Today’s spiders spend most of ...