the worm-like creature was believed to walk on these spines, Liu says. "Named for its bizarre and dreamlike appearance, after the fossils were discovered in Yunnan, scientists revised the position ...

Meanwhile, Hallucigenia looked like a prickly worm with legs ... of paleontologists examined about 150 of the 7-to-8-inch-long fossils using advanced imaging techniques unavailable in the 1980s.