Scientists have announced the discovery of a new horned dinosaur from Alberta, Canada called Xenoceratops foremostensis. The dinosaur, which roamed Cananda 78 million years ago, was identified from fossils originally collected in 1958. The scientists say it is the oldest known large-bodied horned dinosaur. Xenoceratops was a plant-eating dinosaur that was 20 feet long and weighed over 2 tons. Leer más.