Researchers have identified a new 500-million-year-old arthropod fossil, named _Magnicornaspis garwoodi_, from Quebec, Canada, which contributes to understanding the Cambrian period's biodiversity. This fossil belongs to a rare group of early arthropods related to modern spiders and scorpions, and its discovery challenges the notion of a biodiversity collapse known as the Furongian gap. Previously, this gap was thought to indicate a biological crisis, but the new findings suggest it may reflect gaps in fossil exploration and collection. The fossil was originally collected in 1962 but remained overlooked in the Smithsonian National Museum of Natural History until recently. This highlights the potential for significant discoveries within museum collections. The research indicates that ecosystems during the late Cambrian may have been diverse and complex, as supported by similar findings from other regions. The study emphasizes the need for further exploration of under-studied geological formations to uncover more fossils and enhance our understanding of ancient life.