Scientists in Argentina discovered bones of one of the world’s largest dinosaurs. The fossils belonged to a sauropod and they are around 90 million years old. The bones are important because of their size. There are a lot of them, too. Experts also found a lot of teeth from carnivorous animals. The experts will be able to learn what these animals ate. Much about their old ecosystem can be learned, as well.The palaeontologists began to excavate last year. A ranch employee noticed the fossils first

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