The diggers found an entire ecosystem preserved in stone: there were giant long-necked plant-eaters like Diplodocus and Barosaurus, entangled with sharp-toothed Allosauruses and smaller herbivores that walked on two legs, called Camptosaurus. Something horrible had happened here some 155 million years ago. Judging from the contorted angles of their skeletons, the deaths of these animals were neither quick nor painless. Some of the sauropods were found upright, their heavy legs standing tall like columns, stuck in the ancient mud. It seems that these dinosaurs survived a flood, but then were
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