Carnotaurus

Carnotaurus was a carnivore (meat-eater) that lived in South America (its fossils have been found in Patagonia, Argentina) during the late Cretaceous period, about 70 million years ago.

Carnotaurus was about 30 feet (9 meters) long, and stood about 10 feet (3 meters) tall at the hips. It weighed around 2 tons.

The most noteworthy feature of Carnotaurus are the thick horns above the eyes, it is from these it gets its name, which means "flesh bull" (it is a meat-eater, and the horns are said to resemble those of a bull).

Carnotaurus also had a number of other unusual and interesting features:

It had a robust (but small) skull, but a slender low jaw bone.

Its eyes, unusually for a dinosaur, faced forward. Scientists think that this may mean it had binocular vision and depth perception.

It had a relatively long neck as compared to other Theropod dinosaurs.

It had extremely reduced front limbs, each of which ended in a four-fingered hand. 

Although only one near-complete skeleton of Carnotaurus has been so far (at the time of writing this article), this skeleton was accompanied by fossilized skin impressions. From these, we know that Carnotaurus did not have feathers (unlike some other advanced Theropod dinosaurs), but the animals skin was lined with rows of bumps, the bumps growing larger nearer the animal's spine. It is not entirely clear what the purpose of these bumps would have been.