Ключевые слова: ancestral, ancient, archeology, arthropod, artifact, biology, cambrian, creature, crustacean, discovery, education, evolution, extinct, extinction, fantastic, fossil, fossilization, fossilized, geology, history, imprint, invertebrate, large, marine, moroccan, morocco, museum, natural, nature, old, paleontology, paradox, prehistoric, prehistory, preserved, redlichiida, relic, science, sea, sediment, silhouette, species, specimen, stone, structure, trilobite,