Why Tyrannosaurus was a slow runner … and why the largest are not always the fastest

A beetle is slower than a mouse, which is slower than a rabbit, which is slower than a cheetah… which is slower than an elephant? No! For small to medium-sized animals, larger also means faster, but for really large animals, when it comes to speed, everything goes downhill again. For the first time, researchers have described in the journal Nature Ecology and Evolution how this parabola-like relationship between body size and speed comes about. (Mehr in: Pressemitteilungen – idw – Informationsdienst Wissenschaft)