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Original method used to calculate dinosaur mass flawed?

Scientists believe the original method used to calculate dinosaur mass was flawed and that most dinosaurs were half as heavy as previously believed.

Palaeontologists have for 25 years used a published statistical model to estimate body weight of giant dinosaurs and other extraordinarily large animals in extinct lineages,’ said lead researcher Dr Gary Packard from Colorado State University in the US.

‘By re-examining data in the original reference sample, we show that the statistical model is seriously flawed and that the giant dinosaurs probably were only about half as heavy as is generally believed.’

The ‘reference sample’ consisted of 33 species of quadruped mammal, ranging in size from a rodent weighing 47 grams to an elephant weighing almost 4,000 kilograms.

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