{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,9]],"date-time":"2026-03-09T03:13:10Z","timestamp":1773025990363,"version":"3.50.1"},"reference-count":24,"publisher":"American Association for the Advancement of Science (AAAS)","issue":"5927","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Science"],"published-print":{"date-parts":[[2009,5]]},"abstract":"<jats:title>The Birds and the Dinosaurs<\/jats:title>\n          <jats:p>\n            The extent to which primary tissues are preserved in ancient fossils remains controversial.\n            <jats:bold>\n              Schweitzer\n              <jats:italic>et al.<\/jats:italic>\n            <\/jats:bold>\n            (p.\n            <jats:related-article xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"doi\" page=\"626\" related-article-type=\"in-this-issue\" vol=\"324\" xlink:href=\"10.1126\/science.1165069\">626<\/jats:related-article>\n            ; see the news story by\n            <jats:bold>Service<\/jats:bold>\n            ) describe well-preserved tissues and primary collagen sequences from the femur of an 80-million-year-old hadrosaur. The fossil preserved structures resembling primary bone tissues and vessels. Both extracts and tissue pieces were analyzed in multiple laboratories by mass spectrometry, which revealed ancient collagen sequences that support a close relation between birds and dinosaurs.\n          <\/jats:p>","DOI":"10.1126\/science.1165069","type":"journal-article","created":{"date-parts":[[2009,4,30]],"date-time":"2009-04-30T22:40:12Z","timestamp":1241131212000},"page":"626-631","source":"Crossref","is-referenced-by-count":198,"title":["Biomolecular Characterization and Protein Sequences of the Campanian Hadrosaur\n            <i>B. canadensis<\/i>"],"prefix":"10.1126","volume":"324","author":[{"given":"Mary H.","family":"Schweitzer","sequence":"first","affiliation":[{"name":"North Carolina State University, Raleigh, NC 27695, USA."},{"name":"North Carolina Museum of Natural Sciences, Raleigh, NC 27601, USA."}]},{"given":"Wenxia","family":"Zheng","sequence":"additional","affiliation":[{"name":"North Carolina State University, Raleigh, NC 27695, USA."}]},{"given":"Chris 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