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 ...

Here is something to keep arachnophobes up at night. The inside of a spider is under pressure, like the air in a balloon, because spiders move by pushing fluid through valves. They are hydraulic. This ...

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 ...

An unusual fossil brain suggests that the ancestors of spiders and other arachnids may have once scuttled around the sea, rather than on land as was long thought, a new study finds. The fossil shows ...