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Some long-necked dinosaurs may have been far more capable of standing upright than their enormous bodies suggest.
About 66 million years ago, two South American sauropods could rise onto their hind legs and remain there for relatively long periods, especially when they were young. This ability may have helped them reach leaves high in trees, appear more intimidating to predators, attract mates, or reproduce.
The dinosaurs, Uberabatitan from Bra...
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