T Rex’s tiny arms ap­pear lit­tle used

Kuwait Times - - HEALTH -

It turns out The Field Mu­seum’s T Rex Sue didn’t use those tiny arms very much. At least that’s the ini­tial con­clu­sion from a de­tailed look at the fos­sil’s right fore­limb at the Ar­gonne Na­tional Lab­o­ra­tory out­side Chicago. Re­searchers there used a scan to gen­er­ate a 3-D im­age of the arm bones down to the cel­lu­lar level. Fi­nal re­sults will take months or years. Pete Makovicky is as­so­ciate cu­ra­tor of di­nosaurs at the Chicago mu­seum. He said Thurs­day there “aren’t many signs of stress on the bones that would in­di­cate fre­quent use.” But, he adds, there’s still a lot to learn. Pre­cisely why T Rex had fore­limbs is one of the en­dur­ing mys­ter­ies of di­nosaur pa­le­on­tol­ogy. The Field says it will share the re­sults of the study when they’re avail­able.

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