Was This Sea Creature Our Ancestor? Scientists Turn a Famous Fossil on its Head.

Carl ZimmerScience your-feed-science, Research, Fossils, Paleontology, Fish and Other Marine Life, Anatomy and Physiology Researchers have long assumed that a tube in the famous Pikaia fossil ran along the animal’s back. But a new study turned the fossil upside-side down. https://ift.tt/WQhu9Ga