|
These are all really cool. I practically
inhaled them hehehe.
----- Original Message -----
Sent: Monday, October 31, 2005 3:14
PM
Subject: RE: paleonet New creationist
allegation
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?
|