It may be possible to clone dinosaurs

Scientists say they are closer to cloning dinosaurs -- according to a new study based on a discovery made 11 years ago.

Interesting  discovery made in a female Tyrannosaurus Rex fossil

 In 2005, US researchers claimed to have discovered a fossil material in the medullary bone of a pregnant Tyrannosaurus Rex. The information obtained is very important because it is possible that these tissues contain the necessary DNA for replication. The "medullary bone" is a type of bone that forms only in female birds during the period they lay their eggs during or before this period. The presence of this bone was indicated by the tests performed on the fossilized femur of a Tyrannosaurus Rex who lived about 68 million years ago.

Lindsay Zanno, a researcher from North Carolina State University says that researchers currently do not know anything about the sexual traits of the dinosaurs, but they believe that the dinosaurs were not shy to send their signals to show future partners their intentions. She added that the issue of female to male differentiation in dinosaurs still remains a current issue and researchers have found the solution to this problem only after they conducted this recent study. Zanno added that a path full of opportunities has now opened.

The paleontologist Mary Schweitzer has identified the medullary bone in a fossil dinosaur in 2005. The recent study is based on the analysis made by scientists at that time. During this recent study the researchers compared the osteological material of the Tyrannosaurus Rex female with medullary tissue derived from chickens and ostriches. The results showed clearly that the samples have a common characteristic. A substance found only in the medullary bone tissues -- keratin sulfate -- was identified both in ostriches and chickens. This discovery contradicts the hypothesis of scientists until then. Until then, scientists believed that such a compound could not hold up to this huge period of time.

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