Virtual Museum of Art | Virtual Museum of History | Virtual Public Library | Virtual Science Center | Virtual Museum of Natural History | Virtual War Museum
   You are in: Museum of Natural History >> Hall of Paleontology >> Tyrannosaurus Rex





American’s Four United Republics: Discovery-Based Curriculum

For More Information go to America's Four United Republics Curriculum


 


Tyrannosaurus Rex

Osborn - Discovered 1905

Tyrannosaurus rex, from a family of dinosaurs called tyrannosaurids , was first discovered by Barnum Brown in 1902 in Hell Creek, Montana. Although the skeleton was not complete, about 30%, Henry F. Osborn described it in 1906.  There was also enough of the skeleton to attempt a reconstruction and it is now on display at the Carnegie Institute in Pittsburgh.

Tyrannosaurids ranged in size from the 15-foot, 200-pound Nanotyrannus to Tyrannosaurus rex, at 50 feet and 15,000 pounds.  Tyrannosaurus rex lived 136 to 65 million years ago during the Cretaceous Period.  The tyrannosaurids had massive heads, huge bodies, powerful legs, large clawed toes, and serrated teeth. T. rex arms were relatively small yet were very powerful with each hand having two fingers.  Other tyrannosaurids include Albertosaurus, Tarbosaurus, Daspletosaurus, and a few others that are little known. Velociraptor, Troodon, Ornithomimus, and Allosaurus are close cousins.

Tyrannosaurus rex is known to every schoolchild and is one of the last non-avian dinosaurs to walk the earth before the Cretaceous Extinction.  There have been fewer than two-dozen good specimens of these animals found, and the best finds are from areas in western North America.  A listing of Tyrannosaurus rex and other dinosaur exhibits can be found at  http://www.isgs.uiuc.edu/dinos/exhibit.html

 

  Carnegie Museum Pittsburgh T-Rex in their Sculpture Hall

The most famous is “Sue” which was a nickname given to the most complete, 88 - 90%, of the total skeleton was found intact.  Most of the other T. rex skeletons, including the world famous “Scotty” skeleton range between 40 – 50% (see Scotty link below).  This alone makes Sue an important discovery.

 

The remains of Sue were found in 1990 by Sue Hendrickson for whom the T. rex is named.  It was in South Dakota, on Maurice Williams Cheyenne River Reservation Ranch that “Sue” was found.  The Black Hills Institute used over 130 crates and boxes when it excavated Sue.

In 1992 a legal dispute erupted into a FBI raid and a lengthy court battle ensued.  The bones were given to Maurice Williams who sold them at Sotheby’s public auction in October 1997.   If you are interested in the actual court proceedings regarding the disposition of Sue the T rex go to http://www.isgs.uiuc.edu/dinos/jdp/sue/case.htm where the 1993 opinion of the United States court of Appeals for the Eighth Circuit can be found. Currently “Sue” is in the Field Museum, which purchased it with financial support from McDonald's, Disney, the California State University system, and private individuals.  “SUE’s” bones are now on exhibit at The Chicago Field Museum. A CAT scan of Sue's skull can be found at the following web site: http://www.fmnh.org/sue/skull.html

 

It was believed, until recently, that T. rex was the largest terrestrial carnivore of all time standing fifteen feet high, 40 feet in length, and roughly 6 tons in weight.  On March 10, 2000 the Associated Press (see link below) reported, “Scientists have discovered the bones of what could be largest meat-eating dinosaur ever to walk the Earth - a needle-nosed, razor-toothed beast that may have been more terrifying than even the Tyrannosaurus rex.”  The article also noted, “The discovery of the predators' graveyard challenges the theory that the biggest meat-eaters were loners. It also raises the possibility that they lived and hunted in packs - which would make them even more menacing to their prey.”    

In addition to the above challenge of being the largest Carnivore another T. rex “fact” is a current topic of dispute in paleontology.   The question is whether T-rex (or other Tyrannosauridae in general) were predators or scavengers.  Jack Horner, paleontologist at the Museum of the Rockies maintains that T-rex could not have been a predator. His proofs against predation claim the eyes were too small to see prey, arms were too small to hold prey, while oversized legs resulted in slow speed. In fact claims Horner, there is no evidence for predation.  For example, no bones showing tyrannosaur tooth marks that had healed in its prey have ever been found.  With this type of T. rex evidence missing the predator/scavenger debate rages on. The current belief among most paleontologists is that the large predators, such as T-rex were 'opportunistic feeders' meaning they would hunt for food when hungry but not pass up an easy meal of a carcass of a recently deceased dinosaur.                                                                        

What we do know for sure is that T-rex was lizard-hipped and lived during the late Cretaceous period.  It had a muscular neck with a huge jaw filled with teeth 6 inches long that was ideal for tearing and holding prey.  These teeth were serrated like steak knives and were curved back into the jaw making escape from this deadly bite virtually impossible for any unfortunate prey. Fossils of the Tyrannosaurus have been found in North America and Asia.

Text by:  Louis,  Upper St. Clair High School, Upper St. Clair, Pennsylvania

 

Research Links:

Sue at The Field Museum - learn all about the largest, most complete Tyrannosaurus rex, and how its skeleton is being prepared for display. Includes web cam

Scotty: the Tyrannosaurus Rex at East end, Saskatchewan

What Killed The Dinosaurs? – Cretaceous Extinction 

T. rex on Trial:  Examining the Evidence for Meat-eating Dinosaurs

Tyrannosaurus Rex - Was it a predator or a pussycat?


Start your search on Tyrannosaurus Rex.


America's Four United Republics Exhibit - Click Here


Unauthorized Site: This site and its contents are not affiliated, connected, associated with or authorized by the individual, family, friends, or trademarked entities utilizing any part or the subject's entire name. Any official or affiliated sites that are related to this subject will be hyper linked below upon submission and Evisum, Inc. review.

Research Links

  • Dinosaur National Monument

    Copyright© 2000 by Evisum Inc.TM. All rights reserved.
    Evisum Inc.TM Privacy Policy

  • Search:

    About Us

     

     

    Image Use

    Please join us in our mission to incorporate America's Four United Republics discovery-based curriculum into the classroom of every primary and secondary school in the United States of America by July 2, 2026, the nation’s 250th birthday. , the United States of America: We The People Click Here

     

    Childhood & Family

    Click Here

     

    Historic Documents

    Articles of Association

    Articles of Confederation 1775

    Articles of Confederation

    Article the First

    Coin Act

    Declaration of Independence

    Declaration of Independence

    Emancipation Proclamation

    Gettysburg Address

    Monroe Doctrine

    Northwest Ordinance

    No Taxation Without Representation

    Thanksgiving Proclamations

    Mayflower Compact

    Treaty of Paris 1763

    Treaty of Paris 1783

    Treaty of Versailles

    United Nations Charter

    United States In Congress Assembled

    US Bill of Rights

    United States Constitution

    US Continental Congress

    US Constitution of 1777

    US Constitution of 1787

    Virginia Declaration of Rights

     

    Historic Events

    Battle of New Orleans

    Battle of Yorktown

    Cabinet Room

    Civil Rights Movement

    Federalist Papers

    Fort Duquesne

    Fort Necessity

    Fort Pitt

    French and Indian War

    Jumonville Glen

    Manhattan Project

    Stamp Act Congress

    Underground Railroad

    US Hospitality

    US Presidency

    Vietnam War

    War of 1812

    West Virginia Statehood

    Woman Suffrage

    World War I

    World War II

     

    Is it Real?



    Declaration of
    Independence

    Digital Authentication
    Click Here

     

    America’s Four Republics
    The More or Less United States

     
    Continental Congress
    U.C. Presidents

    Peyton Randolph

    Henry Middleton

    Peyton Randolph

    John Hancock

      

    Continental Congress
    U.S. Presidents

    John Hancock

    Henry Laurens

    John Jay

    Samuel Huntington

      

    Constitution of 1777
    U.S. Presidents

    Samuel Huntington

    Samuel Johnston
    Elected but declined the office

    Thomas McKean

    John Hanson

    Elias Boudinot

    Thomas Mifflin

    Richard Henry Lee

    John Hancock
    [
    Chairman David Ramsay]

    Nathaniel Gorham

    Arthur St. Clair

    Cyrus Griffin

      

    Constitution of 1787
    U.S. Presidents

    George Washington 

    John Adams
    Federalist Party


    Thomas Jefferson
    Republican* Party

    James Madison 
    Republican* Party

    James Monroe
    Republican* Party

    John Quincy Adams
    Republican* Party
    Whig Party

    Andrew Jackson
    Republican* Party
    Democratic Party


    Martin Van Buren
    Democratic Party

    William H. Harrison
    Whig Party

    John Tyler
    Whig Party

    James K. Polk
    Democratic Party

    David Atchison**
    Democratic Party

    Zachary Taylor
    Whig Party

    Millard Fillmore
    Whig Party

    Franklin Pierce
    Democratic Party

    James Buchanan
    Democratic Party


    Abraham Lincoln 
    Republican Party

    Jefferson Davis***
    Democratic Party

    Andrew Johnson
    Republican Party

    Ulysses S. Grant 
    Republican Party

    Rutherford B. Hayes
    Republican Party

    James A. Garfield
    Republican Party

    Chester Arthur 
    Republican Party

    Grover Cleveland
    Democratic Party

    Benjamin Harrison
    Republican Party

    Grover Cleveland 
    Democratic Party

    William McKinley
    Republican Party

    Theodore Roosevelt
    Republican Party

    William H. Taft 
    Republican Party

    Woodrow Wilson
    Democratic Party

    Warren G. Harding 
    Republican Party

    Calvin Coolidge
    Republican Party

    Herbert C. Hoover
    Republican Party

    Franklin D. Roosevelt
    Democratic Party

    Harry S. Truman
    Democratic Party

    Dwight D. Eisenhower
    Republican Party

    John F. Kennedy
    Democratic Party

    Lyndon B. Johnson 
    Democratic Party 

    Richard M. Nixon 
    Republican Party

    Gerald R. Ford 
    Republican Party

    James Earl Carter, Jr. 
    Democratic Party

    Ronald Wilson Reagan 
    Republican Party

    George H. W. Bush
    Republican Party 

    William Jefferson Clinton
    Democratic Party

    George W. Bush 
    Republican Party

    Barack H. Obama
    Democratic Party

    Please Visit

    Forgotten Founders
    Norwich, CT

    Annapolis Continental
    Congress Society


    U.S. Presidency
    & Hospitality

    © Stan Klos

     

     

     

     


    Virtual Museum of Art | Virtual Museum of History | Virtual Public Library | Virtual Science Center | Virtual Museum of Natural History | Virtual War Museum