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Westfield State College
PHYS 0106 (Spring, 2001)
Earth History Timeline
stegosaur Teton Range
Phanerozoic Eon: Mesozoic Era: Cretaceous Period

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A T.rex Called Sue
Writer/Researcher: Marion Roberts
Editor: Nancy Sacchetti
Web Page Builder: Marion Roberts


Sixty-seven million years ago one of Earth’s largest animals, 13 feet tall at the hip, 41 feet long and weighing 7 tons, was possibly hunting for her lunch, when she died. She lay, relatively undisturbed, until she was unearthed in 1990. After a complicated legal battle, Sue was auctioned for 8.36 million dollars to the Chicago Field Museum.

The challenge for the museum was to display her in a lifelike way for visitors and have accessability for researchers. To accomplish this the museum used a team of metalworkers, jewelry designers and scientists to construct an almost invisible structure to support the skeleton. Every bone is removable. A new, lighter head was fashioned. The original skull is about 5 feet long with bones 4 inches thick, making it too heavy for display. It will be displayed separately.

What big teeth you have!Only 22 T.rex skeletons exist; none is complete. Sue, at over 90% intact, is a rare find. It is the first time a furcula or wishbone has been found as part of a T.rex. The skull is almost intact and especially interesting. CT-scans indicate Sue had a tremendous sense of smell. Most of her gorilla size brain was devoted to it. The eyes were focused forwards and had depth perception. The lower jaw could separate, like a snake. The 58 teeth, some 30.5 cm long, were well anchored in the jaw. New teeth would grow in to replace any lost ones. They curved in to keep prey from slipping away. This supports the theory that T.rex was a hunter. The forearms are about 3 feet long, about human size, but capable of lifting 400 pounds. Their movement does appear to have been limited.

Sue was old, several of her bones show healed fractures. Her jaw has several holes in it. She may have been suffering from a disease or an infection. It is impossible to tell what sex Sue was or what color she was. It is not known how she died. She may have drowned. Scientists believe that after death, fast moving water flipped her over crushing her skull.






REFERENCES

- Sue at the Field Museum. Retrieved from world wide web May 2, 2001.