In Thursday's issue of the journal Nature, paleontologists estimate that the giant apatosaurus, formally known as brontosaurus, put on more than 30 pounds a day at the height of its adolescent growth spurt.
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Kaplowitz and his co-authors point out that " the younger the age at onset of puberty, the longer the duration of puberty, " meaning that the adolescent growth spurt occurs for a longer time in early-maturing girls.
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They include the occurrence of secondary characteristics beginning with breast development, the adolescent growth spurt, the onset of menarche which does not correspond to the end of puberty and the acquisition of fertility, as well as profound psychological modifications.
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"If kids grew like that and had an adolescent growth spurt at a rate like T . rex, they'd wind up 12 feet tall before they were 20, " said Gregory Erickson, a paleontologist at Florida State University who has just returned from hunting more dinosaur fossils in northeastern Alberta's badlands.
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Examples of cases where stretch marks are common, also given by the Mayo Clinic, include weight gain ( in the form of fat and / or muscle ), pregnancy, and adolescent growth spurts, though it is also noted that some medications, as well as other medical conditions and diseases, may increase the likelihood of stretch marks appearing.
