Brontosauruses are, as previously suggested, a member of the dinosaur family, along with the triceratops *(see last post)
As you can see from the picture above, brontosauruses are enormous and do not have good posture.
And I don't care what you say, you've got to give that brontosaurus some credit (the one in the picture) for going out on a walk in a lightning storm. That takes some balls.
Prehistoric genitals.