Fossils paleontologists initially thought belonged to a juvenile Tyrannosaurus rex actually belong to a new species of ...

The jaw fossil for Tyrannosaurus mcraeensis has key distinctions from T. rex. Paleontologists have discovered a new species of dinosaur that could be the closest-known relative of the famed ...

MARIBO, Denmark -- A new, giant-horned species of dinosaur was discovered that researchers said is the "largest and most ornate" of its kind ever found, according to a study published Thursday in the ...