It may lessen tyrannosaurus rex's box office cachet as a scary villain, but dinosaur expert Jack Horner said his research pegs T. rex as more like a hyena than a lion. That is to say, the big fellow ...

CC0 Usage Conditions ApplyClick for more information. But a new census of all dinosaur skeletons unearthed over a large area of Eastern Montana shows that Tyrannosaurus was too numerous to have ...