Only one skeleton has been found, and it's nearly perfect!

Weighing over 50,000 pounds, Brontosaurus was one of the largest creatures to ever roam the Earth.

Citipati's eggs were about 7 inches long, and they nested with up to 22 eggs in a clutch.  Also, this dino was covered in fluffy fur-like feathers!

Carnotaurus was the apex predator of its region and time period.  And this dino had the tinest arms of ALL dinosaurs... even smaller than the arms of T-Rex!

Cryolophosaurus has been playfully referred to as 'Elvis-osaurus' because of this dino's cool head piece (which looks a bit like the famous hairstyle of Elvis Presley.)

Not actually a dinosaur, but technically a mammal-like reptile called a non-mammilian synapsid.

This dino had a wingspan of 4 feet and was about the size of a crow.  Technically a flying reptile, and not a dinosaur.

Gallimimus' feet look just like the feet of an ostrich and this dino could run as fast as a cheetah!

This dino weighed about 25 pounds.

Hungarosaurus was covered from head to tail with hundreds of dermal osteoderms (a fancy word for all those bumps and spines).

Jaxartasaurus is named after the Jaxartes River,

where the first skeleton was discovered.

The dome shaped skull was up to 8 inches thick in the center. 

Some scientists believe air could be pushed through Parasaurolophus' head crest like a flute, to make sounds.  The name meaning refers to another dinosaur, Saurolophus, which was discovered before Parasaurolophus.

Technically not a dinosaur, but an aquatic reptile.  Plesiosaur is closer to a turtle than a dinosaur.

Because of Spinosaurus's slender crocodile like skull, it's believed that this dino may have lived life partially in the water. 

Stegosaurus didn't have strong jaws and grinding teeth, just a sharp toothless beak for plucking greens, and small teeth.  It's believed that Stegosaurus was one of the first dinos to evolve cheeks, to help better chew up its greens!

T-Rex was a smart dinosaur, with a brain that was 2ce the size of other carnivores at that time.

Triceratops Dinos grazed in herds.  Some scientists believe that the large head frill on this dino had blood vessels that could flush with color and be used to signal to its herd.

Quill knobs have been found on Velociraptor skeltons, meaning they had feathers, though they don't appear to have had the ability to fly.  It's now believed that the specialized hooked toe claw was for pouncing and hanging on to prey, rather than for slashing.  Also, Velociraptor may have been able to use those claws to climb.