The largest animals ever to have walked the face of the earth may not have been as big as previously thought, reveals a paper published  in the Zoological Society of London’s Journal of Zoology.Scientists have discovered that the original statistical model used to calculate dinosaur mass is flawed, suggesting dinosaurs have been oversized.Widely cited estimates for the mass of Apatosaurus louisae, one of the largest of the dinosaurs, may be double that of its actual mass (38 tonnes vs. 18 tonnes).

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