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New analysis cuts massive dino’s weight in half

Dreadnoughtus maybe wasn’t as dreadful as original estimates suggested

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7:05pm, June 9, 2015
drawing of gigantic dinosaur Dreadnoughtus schrani

SIZE CHECK  The gigantic dinosaur Dreadnoughtus schrani may not have weighed as much as scientists thought. A new analysis of bone volume puts the dino’s weight at as little as 22,000 kilograms.

One of the world’s heaviest dinosaurs may be getting demoted to a lower weight class.

Dreadnoughtus schrani, an herbivore known for its record-breaking mass of 59,300 kilograms, probably weighed only about half as much, scientists conclude in a new analysis published online June 9 in Biology Letters.

The famous dinosaur may have been a little bit bigger than Apatosaurus — but not much, says study coauthor Karl Bates, a biologist at the University of Liverpool in England.

“It’s not the sort of game-changing massive difference that it was built up to be,” he says.

Last year, paleontologist Kenneth Lacovara of Drexel University in Philadelphia and colleagues estimated Dreadnoughtus’ mass by plugging thigh and arm bone

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