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Press Release 05-048

T. rex Fossil Yields Soft Tissue

Material may contain preserved biomolecules

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T. rex soft tissue.

Fragments of soft tissue extracted from the marrow cavity of a T. rex femur, after the surrounding bone mineral has been dissolved away. (A) The demineralized fragment is flexible and resilient and, when stretched (arrow), returns to its original shape. (B) Demineralized bone in (A) after air drying. The overall structural and functional characteristics remain after dehydration. (C) Regions of demineralized bone show fibrous material (arrows). Scale bars: 0.5 mm.

Credit: From Schweitzer et al., Science 307:1952-1955 (2005). Reprinted with permission from AAAS.


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Two Tyrannosaurus rex adults are alert and ready to hunt.

Two Tyrannosaurus rex adults are alert and ready to hunt. A pterodactyloid pterosaur Pteranodon ingens can be seen overhead. The scene takes place on the margin of a floodplain in the future area of western Montana, during the Hell Creek formational time of the late Cretaceous Period.

Credit: "Awakening of Hunger" (Tyrannosaurus) @ 1985 Mark Hallett. All Rights Reserved.

Artist permission is required to reproduce art images. Please contact MARK HALLETT PALEOART at marksabercat@q.com or (503) 831-1164.


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