This new Lambeosaurini find, combined with earlier discoveries of tyrannosauroid teeth in the same area, confirms that Late Cretaceous Laurasia had a classic dinosaur ecosystem. This ecosystem was ...

Scientists divide the Mesozoic Era into three periods: the Triassic, Jurassic and Cretaceous. During this era ... split into two, creating Laurasia in the north and Gondwana in the south. Despite this ...