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

Finely preserved brain features in a tiny marine arthropod fossil suggest that arachnids – spiders and their close kin – may ...

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.

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