Cryolophosaurus

Cryolophosaurus lived in Antarctica!  It is the first known dinosaur that lived on Antarctica.  Cryolophosaurus had an unusual sheetlike crest and no feathers and he ate meat.  He was 21 and a half feet long and weighed 1000 pounds.  He also had three fingers, three toes, and a neck about as big as the neck of a T. Rex.

Diplodocus

Diplodocus is 82 feet long and weighed 16 tons.  He is like a Brachiosaurus with a longer tail and smaller body.  He is slow and also uses his tail for balance.  Diplodocus is not very tall compared to Brachiosaurus, though, and must have had tough neck and tail bones.