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 ...

The special brains of spiders may have started to evolve in the oceans, long before their ancestors crawled onto land. A fresh look at a 500-million-year-old fossil by researchers from the University ...

Add Yahoo as a preferred source to see more of our stories on Google. An unusual fossil brain suggests that the ancestors of spiders and other arachnids may have once scuttled around the sea, rather ...

Whether you love spiders or can't be within 10 feet of them, you probably think of them crawling around on land. And based on the fossil record, most researchers would probably say the same thing. For ...

Illustration of what the Mollisonia animal would have looked like at the time it lived, more than 500 million years ago. A new analysis of an exquisitely preserved fossil that lived half a billion ...

Finely preserved brain features in a tiny marine arthropod fossil suggest that arachnids – spiders and their close kin – may have first evolved in the ocean rather than on land, say scientists. A new ...

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 ...

The brain of a sea creature that lived over 500 million years ago was organised like that of a spider – suggesting that arachnids may have not evolved on land as previously thought. It had been ...

The main point of distinction between this creature and true spiders: It very likely could produce silk but lacked the spinnerets used by true... Scientists have discovered a well-preserved 305 ...