Xenoceratops foremostensis
In October Canadian scientists named a new horned dinosaur species Xenoceratops foremostensis, which means "alien horned-face." Technically this wasn't a new dinosaur discovery (fossils of this species were originally found in 1958), but with a name like that and a face like, well, a horned alien, we couldn't resist including it.
This guy lived 80 million years ago, predating most of the horned dinosaurs, including Triceratops. It was probably around 20 feet long and weighed about 2 tons, had a beak like a parrot and ate plants.
Image: © Julius T. Csotonyi 2012