Paleontologists unearthed fossils in the Grand Canyon dating back more than 500 million years that offer a new look into a time when complex life emerged on Earth.

Paleontologists named the worm Kraytdraco spectatus, for its resemblance to a Star Wars monster. They say it sheds light on the Grand Canyon’s prehistoric ecosystem.

Frustratingly, fossils from later in the Cambrian period are rarer, so we don't have a clear picture of evolution's experimental second album. But a newly discovered batch of extremely well-preserved fossils could patch up that gap.