During the dinosaur era, Earth was home to supercontinents—massive landmasses comprising at least 75% of the Earth’s land. Pangea, Gondwana, and Pannotia are the most recognized recent supercontinents. Earlier supercontinents included Nuna (Columbia), Rodinia, and Ur. Argoland: The Vanished Supercontinent … Continue reading Discovery of the Lost Continent of Argoland