Some dinosaurs could rise like giants until they grew too big

Two South American sauropods possessed a remarkable ability: they could rear up on their hind legs despite their elephant-like size. ScienceDaily reports that digital modeling revealed these dinosaurs had unusually robust thigh bones that could handle the enormous forces involved in standing upright—particularly when they were younger. Scientists believe the behavior served multiple purposes: reaching higher into the treetops, frightening predators, or impressing potential mates.

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