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They
are talking about a couple of recent articles by Mary Schweitzer et al. on soft
tissue in Tyrannosaurus rex. These are: M. H. Schweitzer, J.
L. Wittmeyer, J. R. Horner, and J. A Toporski, Science 307, 1952(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.
1 Department of Marine, Earth, Atmospheric Sciences, North
Carolina State University, Raleigh, NC 27695, USA.
2 North
Carolina State Museum of Natural Sciences, Raleigh, NC 27601,
USA.
3 Museum of the Rockies, Montana State University, Bozeman,
MT 59717, USA.
4 Carnegie Institution of Washington, Geophysical
Laboratory, 5251 Broad Branch Road N.W., Washington, DC 20018, USA.
and
M. H.
Schweitzer, J. L. Wittmeyer, and J. R. Horner, Gender-specific Reproductive
Tissue in Ratites and Tyrranosaurus rex, Science Vol. 308, June 3, 2005, p.
1456-1460.
Gender-Specific Reproductive Tissue in Ratites and Tyrannosaurus rex
Mary H.
Schweitzer,1,2,3*
Jennifer L. Wittmeyer,1 John R.
Horner3
Unambiguous indicators of gender in dinosaurs are usually lost
during fossilization, along with other aspects of soft tissue
anatomy. We report the presence of endosteally derived bone
tissues lining the interior marrow cavities of portions of
Tyrannosaurus rex (Museum of the Rockies specimen number 1125)
hindlimb elements, and we hypothesize that these tissues are
homologous to specialized avian tissues known as medullary bone.
Because medullary bone is unique to female birds, its discovery in
extinct dinosaurs solidifies the link between dinosaurs and birds,
suggests similar reproductive strategies, and provides an objective
means of gender differentiation in dinosaurs.
1 Department of Marine, Earth, and Atmospheric Sciences, North
Carolina State University, Raleigh, NC 27695, USA.
2 North
Carolina State Museum of Natural Sciences, Raleigh, NC 27601,
USA.
3 Museum of the Rockies, Montana State University, Bozeman,
MT 59717, USA.
Don't
know anything else about the planned meetings.
Rich
Lane
Hello all-
I just finished reading an article produced by
the Creation Studies Institute in which they allege "the most recent findings
of soft tissue in what is supposedly a 65-million year old dinosaur."
Does anybody have any idea what the hell they are talking about?
According to the article the creationists are now fighting among themselves as
to whether the earth is 6000-10000 years old with literal 24 hour days from
get go or whether it is billions of years old and one day in Genesis equals
eons. They are now hosting public debates with "expert" presenters to
examine the "evidence." Anybody know anything about this juicy
dinosaur?
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