Roughly 165 million years ago during the mid-Jurassic, Madagascar is an alien place. The famously large island has yet to fully cleave itself tectonically from India and Africa, still crammed together with the rest of the southern supercontinent of Gondwana. Primates have yet to evolve, and flowers aren’t even a thing yet. This Madagascar is instead alive with a spectacular diversity of dinosaurs and reptiles, racing along the dirt and soaring above the forests. But everything that slinks, bounds, and lumbers across this sun-baked, proto-Madagascan theater is united in unshakeable wariness over the region’s most feared apex predator: Razanandrongobe sakalavae, an enormous, land-striding relative of crocodiles with a nightmare where its face ought to go.