http://www.sciencemag.org/cgi/content/full/307/5717/1952
Science, Vol 307, Issue 5717, 25 March 2005
Soft-Tissue Vessels and Cellular Preservation in Tyrannosaurus
rex
Mary H. Schweitzer,1,2,3* Jennifer L. Wittmeyer,1 John R. Horner,3
Jan K. Toporski4{dagger}
Soft tissues are preserved within hindlimb elements of
Tyrannosaurus rex (Museum of the Rockies specimen 1125). Removal of
the mineral phase reveals transparent, flexible, hollow blood
vessels containing small round microstructures that can be
expressed from the vessels into solution. Some regions of the
demineralized bone matrix are highly fibrous, and the matrix
possesses elasticity and resilience. Three populations of
microstructures have cell-like morphology. Thus, some dinosaurian
soft tissues may retain some of their original flexibility,
elasticity, and resilience.
this one ah?
also from journal article
