Scientists have discovered that dinosaurs may have been much lighter and sleeker than previously thought because of potential flaws in the equations used to calculate their weight.
The findings could force researchers to rethink many of their beliefs, particularly about giant plant eaters such as apatosaurus which had been thought to weigh up to 37 tons. The creature's real weight was closer to 18 tons, according to new calculations.
Tyrannosaurus rex, the best-known predatory species, may have been far more lithe than imagined and able to move and turn at high speed.
"Palaeontologists have for 25 years used a statistical model to estimate the body weight of giant dinosaurs and other extraordinarily large extinct animals," said Gary Packard, from Colorado State University, whose research will appear in the Zoological Society of London's Journal of Zoology this week."We have found that the statistical model is seriously flawed and the giant dinosaurs probably were only about half as heavy as is generally believed."
Be pretty if you are,
Be witty if you can,
But be cheerful if it kills you.