User:Abyssal/Prehistory of North America/DYK/50


 * ...that the freshwater weed Azolla may have grown in the Arctic Ocean with enough vigour to plunge the world into an ice age?
 * ...that Othniel Charles Marsh named two species of the dinosaur Coelurus from the same quarry, not knowing that the bones belonged to the same skeleton?
 * ...that species of Prosaurolophus, a duckbilled dinosaur, have been described by Barnum Brown and Jack Horner, two of the most prominent paleontologists of the 20th century?
 * ... that the Maya city of Kinal in northern Guatemala possessed an unusually complex acropolis but is noted for its complete absence of sculpted stelae and altars?