A timeline of the spider fossil record -- Fossils -- Living fossils -- Chance and change -- Outward and upward -- Triumph over thin air -- Small changes, big benefits -- Spinning, running, jumping, ...

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 ...