Encyclopedia

Alamosaurus (AL-uh-mo-SAWR-us; “Ojo Alamo lizard”) is a genus of titanosaurian sauropod dinosaur that roamed what is now southwestern North America during the Late Cretaceous period, approximately 70 to 66 million years ago. Its name refers to the Ojo Alamo Formation in New Mexico where its first fossils were discovered by paleontologist John B. Reeside Jr. […]

Alaskacephale (uh-LASS-kuh-SEF-uh-lee; “Alaska head”) is a genus of pachycephalosaurid dinosaur that lived during the Late Cretaceous period, approximately 70 to 69 million years ago. Its fossils were discovered in the Prince Creek Formation of Alaska, USA. The name refers to the location of its discovery and the characteristic thickened skull common to its group, derived