The Evolution of the Tyrannosaurus

When you look at the something like Tyrannosaurus or related or similar creatures, this tended to happen late in the game that the arms got really small. So paleontologists are increasingly able to think of how they might have existed as social creatures. And I always see the idea that we're supposed to figure out what those little arms were for. The idea seems to be that the arms were becoming small in order to serve some purpose. It's life, but not as we know it.