Titanosaurs
The golden age of the sauropods was the end of the Jurassic period, when these multi-ton dinosaurs roamed all the earth's continents. By the beginning of the Cretaceous, sauropods like Brachiosaurus and Apatosaurus had gone extinct, to be replaced by the titanosaurs--equally large herbivores characterized by (in most cases) tough, armored scales and other rudimentary defensive features. As with sauropods, the frustratingly incomplete remains of titanosaurs have been found all over the world.
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