Posts Tagged ‘T. rex’

In the December 26^th CBS 60 Minutes news segment, reporter Leslie Stahl in the story “B-REX” interviewed paleontologists Jack Horner in Montana, Mary Schweitzer in North Carolina, and Sean Carroll in Wisconsin on the B-rex discoveries.

B-rex is actually a Tyrannosaurus rex, otherwise known as T-rex, found in Montana and the fossil was re-named after Bob Harmon, the chief preparator of paleontology Museum of the Rockies in Montana. The primary interest in B-rex centered on the discovery soft-tissue and blood vessels in the estimated 68-million-year-old dinosaur.

Since this medullary tissue in the bone marrow is similar to birds, speculations on the evolution of dinosaur to bird once again emerged in the prime time media. The original report was published in the March 25, 2005, issue of the journal Science was entitled “Gender-Specific Reproductive Tissue in Ratites and Tyrannosaurus rex”.

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According to the February 27^th edition of Nature, more doubts now cloud the claim that dinosaur protein has been sequenced. Now a long-time critic has called for an independent review of the 2007 studies of ancient protein from a fossilized Tyrannosaurus rex after fresh analysis revealed traces of ostrich haemoglobin in the original samples.

In the contentious papers, researchers identified seven fragments from a protein called collagen, found in connective tissue, and said their sequences most closely matched the chicken version of the protein. The samples came from the fossilized femur of a T. Rex. As well as further strengthening the evidence for the link between dinosaurs and birds, the findings would make the protein the oldest ever to be sequenced. The work, published in Science, garnered headlines worldwide and met with considerable scepticism at the time, for good reason—fraud.

The hunt for Darwin’s “inconceivably great” missing links continues.