How Dinosaurs Ran

gazelles, and they cannot do so because of their size. Imagine how some dinosaurs, much more massive than any elephant, must have moved. Perhaps their legs were too weak to support their enormous weight, so they lived in lakes and depended on water to buoy them up, as some old pictures suggest. Or perhaps their limbs were strong enough to support them and they walked and ran like elephants—or some of the more athletic modern animals—despite their size.