Slow and steady or a big spurt? How to grow a ferocious dinosaur

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Large meat-eating dinosaurs attained their great size through very different growth strategies, with some taking a slow and steady path and others experiencing an adolescent growth spurt, according to scientists who analyzed slices of fossilized bones.

FILE PHOTO: Geologist Bill Simpson uses a feather duster to clean the Tyrannosaurus rex fossil known as"Sue" at the Field Museum in Chicago, Illinois, United States, June 11, 2015. REUTERS/Jim Young/File Photo

The team looked at samples from museums in the United States, Canada, China and Argentina and even received clearance to cut into bones from one of the world’s most famous T. rex fossils, known as Sue and housed at the Field Museum in Chicago, using a diamond-tipped saw and drill. Sue inhabited South Dakota about a million years before dinosaurs and many other species were wiped out by an asteroid impact 66 million years ago.

 

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