It is sunrise in the Early Cretaceous, approximately 130 million years ago. On the insular savanna that will someday become Spain, the carcharodontosaurid predator Concavenator is waking up within sight of a grazing herd of Mantellisaurus. Distinguished by the prominent dorsal “fin” above its hips, Concavenator was relatively small for a carcharodontosaurid dinosaur, with a body length of less than twenty feet.