{"id":43962,"date":"2016-10-12T17:25:11","date_gmt":"2016-10-12T22:25:11","guid":{"rendered":"http:\/\/news.medill.northwestern.edu\/chicago\/?p=43962"},"modified":"2016-10-12T21:55:39","modified_gmt":"2016-10-13T02:55:39","slug":"argonnes-x-ray-beam-shines-on-sue-and-shows-she-didnt-use-those-little-arms","status":"publish","type":"post","link":"https:\/\/news.medill.northwestern.edu\/chicago\/argonnes-x-ray-beam-shines-on-sue-and-shows-she-didnt-use-those-little-arms\/","title":{"rendered":"Argonne\u2019s x-ray beam shines on Sue and shows she didn\u2019t use those little arms"},"content":{"rendered":"

By Hannah Moulthrop<\/strong><\/p>\n

T. rex decimated prey with those mighty jaws and powerful legs and tail. But one of the great mysteries of the mighty dinosaur is how it used those tiny arms.<\/p>\n

Preliminary study of T. rex Sue\u2019s right arm shows a lack of use and possible evidence of gout in her fingers.
\n
\nScientists at the Field Museum in Chicago removed the arm and sent it for high-powered imaging by the Advanced Photon Source at Argonne National Laboratory near Lemont. Sue got her arm back and some answers today.<\/p>\n

Sue weighed between seven to ten tons, while having arms as small as an adult human\u2019s, said Peter Makovicky, the Field\u2019s associate curator of dinosaurs.<\/p>\n

Argonne\u2019s scanner shot the brightest x-ray beams in the Western Hemisphere to \u201csee\u201d into the bones and find any evidence of wear and tear such as micro-fractures. The detector beam, a powerful CT scanner, revealed that Sue may not have used her arm much at all.<\/p>\n

Bones that are well used have a firm structure due to calcium storage, said Carmen Soriano Hoyuelos, a beamline scientist with the Advanced Photon Source at Argonne. But Sue\u2019s arm bones were very hollow, indicating a lack of use that would have made them more brittle, she said.<\/p>\n

Two of Sue\u2019s fingers subjected to the high-resolution scan show their microstructure and reveal another aspect of the dinosaur\u2019s life.<\/p>\n

\u201cSue has a lot of points of disease and injury in her skeleton\u201d overall, Makovicky said, mentioning \u201cevidence of broken ribs, evidence of infection, arthritis\u201d and even tail injuries.<\/p>\n

\u201cSo one of the fingers shows what people have seen, thinking or interpreting it as gout. If you have a very acute case of gout, what you see is the bones eaten up,\u201d said Soriano Hoyuelos, adding that dinosaurs are not the same as humans and that the lab is still looking for evidence of disease.<\/p>\n

Gout in humans is an acute form of arthritis that results from too much uric acid in the body. High uric acid levels can be associated with excessive alcohol consumption or use of medication such as diuretics.<\/p>\n

While Sue\u2019s arm was reattached Wednesday morning and is back on display, Soriano Hoyuelos and Makovicky among others still have lots of scanner data to process.<\/p>\n

Soriano Hoyuelos estimated that studying all of the data could take one to two months.<\/p>\n

\u201cSue is still the most complete T. rex yet found, so there\u2019s a wealth of information there,\u201d Makovicky said. The next step will be to compare the results to data from other predatory dinosaurs, he said.<\/p>\n

The Advanced Photo Source at Argonne is used for analysis of everything from pharmaceutical components to mechanical processes such as fuel injection. This is the first time it has been used to evaluate a dinosaur fossil.<\/p>\n

Photo at top: Sue, the Field’s famous T. rex, lost an arm to a high-powered x-ray examination at Argonne National Laboratory near suburban Lemont. The arm and some results are back. (Hannah Moulthrop\/MEDILL)<\/div>\n","protected":false},"excerpt":{"rendered":"

By Hannah Moulthrop T. rex decimated prey with those mighty jaws and powerful legs and tail. But one of the great mysteries of the mighty dinosaur is how it used those tiny arms. Preliminary study of T. rex Sue\u2019s right arm shows a lack of use and possible evidence of gout in her fingers.<\/p>\n","protected":false},"author":305,"featured_media":43959,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[194,452,2941,29],"tags":[192],"class_list":["post-43962","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-arts-culture","category-beyond-chicago","category-fall-2016","category-health-and-science","tag-promo"],"yoast_head":"\nArgonne\u2019s x-ray beam shines on Sue and shows she didn\u2019t use those little arms - Medill Reports Chicago<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/news.medill.northwestern.edu\/chicago\/argonnes-x-ray-beam-shines-on-sue-and-shows-she-didnt-use-those-little-arms\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Argonne\u2019s x-ray beam shines on Sue and shows she didn\u2019t use those little arms - Medill Reports Chicago\" \/>\n<meta property=\"og:description\" content=\"By Hannah Moulthrop T. rex decimated prey with those mighty jaws and powerful legs and tail. 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