A new analysis of an exquisitely preserved fossil that lived half a billion years ago suggests that arachnids—spiders and their close kin—evolved in the ocean, challenging the widely held belief that ...

The knotty sea spider, Pycnogonum litorale, is not actually a spider, but it does represent a significant early branch in the genetic family tree that includes spiders, as well as scorpions, ticks and ...

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 ...

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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 ...

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 ...

In 1980, a fossil pulled from the carbon-rich rock beds of central Argentina stunned the paleontological world. Named Megarachne servinei, the creature was hailed as the largest spider ever discovered ...

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 – ...