A recent study by researchers from Temple, the University of Cape Town and the Museum of Nature and Science in Dallas has found that duck-billed dinosaurs that lived within Arctic latitudes approximately 70 million years ago endured long, dark polar winters instead of migrating to more southern latitudes. The findings, “Hadrosaurs Were Perennial Polar Residents,” were published in the April issue of the journal "The Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology."