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A huge, meat-eating hunter, the Allosaurus could weigh as much as 4 tons! Scientists know a lot about this dinosaur because it left many fossils. In this educational volume presented by Scientific American, readers find out about how these giant carnivores looked, what they ate, where they lived, and so much more. Fun fact boxes add to the science information, and full-color images of what these dinosaurs may have looked like as well as their fossils complement the main content. The subject matter helps readers build knowledge, a key part of the science of reading.