Tinker the Juvenile Tyrannosaurus rex Right Hand & Arm
Tinker the Juvenile Tyrannosaurus rex Right Hand & Arm
Tinker the Juvenile Tyrannosaurus rex Right Hand & Arm
Tinker the Juvenile Tyrannosaurus rex Right Hand & Arm
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Tinker the Juvenile Tyrannosaurus rex Right Hand & Arm

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The hand and arm of Tinker are about the same size an adult human. Despite their tiny size compared to the overall size of Trex the arms are believed to have been very strong but with very limited range of motion. It is estimated that those tiny arms could still curl over 400 pounds. This specimen consists of the complete hand, ulna, radium and humerus. It makes the untimate back scratcher.

The skeleton of a juvenile Tyrannosaurus rex was discovered in the Cretaceous, Hell Creek Formation badlands of South Dakota in 1998. The skeleton was given the nickname Tinker in honor of its discoverer. This skeleton proved to be one of the most complete juvenile Tyrannosaurus rex skeletons yet found. After a lengthy court battle over ownership the bones were assembled, repaired, replaced and mounted into a 7.5-meter skeleton with about 40% original bone with a body size approximately 70% of an adult.

The teeth are particularly interesting because they show the same shape and profile of adults. This helped proved that the genus Nanotyrannus was indeed a valid genus and not the juvenile version of Tyrannosaurus rex

The next surprise about Tinker was two broken and healed ribs. A bone pathology refers to abnormalities in bone growth or healing from injury or disease. Such abnormalities (pathologies) are not limited to modern or living animals and are also found in the fossil record. Finding bone pathologies in the fossil record are rare. The broken and healed ribs show how injury or disease affected the normal growth of the bone. It is fascinating to see how the animal reacted to the injury or disease and to speculate if it ultimately led to the animal’s death.

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