Described as 'feats of engineering', the largest sauropod dinosaurs weighed close to 100 tonnes - ten times the record weight of a modern elephant. Sauropods therefore include the largest land animals ever to have lived. They were a very successful herbivorous group, arising in the early Jurassic and surviving for around 100 million years. Fossil footprints show that sauropod dinosaurs travelled in herds. Notable sauropods include Diplodocus, Apatosaurus (formerly Brontosaurus) and the record-breaking heavyweight Argentinosaurus.

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