Tue, 07/23/2024 - 19:01 Gizmodo Discovered over a century ago, paleontologists think they've finally cracked the code of the wacky creature's morphology. Tags paleontology, animals, arthropods, Bizarre, Burgess Shale, cambrian explosion, fossils, jaws Source Ancient Arthropod Was Shaped Like a Taco and Swam Upside-Down