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

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

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

One of the best ways to learn how Antarctic sea spiders thrive under extreme conditions is to squeeze their guts out through ...

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