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CHICAGO, UNITED STATES: Fossil hunter Sue Hendrickson smiles at the unveiling of the Tyranosaurus rex skeleton "Sue" that Hendrickson discovered and bears her name at the Field Museum of Natural History in Chicago, Illinois, 17 May, 2000. The museum spent nearly two years preparing the fossil which is the largest and best preserved T. Rex specimen ever uncovered. (JOHN ZICH/AFP/Getty Images) ( APW2000051720047 )

The Tyrannosaurus Rex skeleton known as Sue stands on display at Union Station June 7, 2000 in Washington D.C. Sue, the 67 million-year-old dinosaur, is scheduled to be put on display in many cities around the world. (Photo by Mark Wilson/Newsmakers) ( 375872sue200_20010629_29428.jpg )

Bill Simpson, collections manager of fossil vertebrates at Chicago's Field Museum, reaches over to dust the Tyrannosaurus rex skeleton known as Sue on display at museum Wednesday, May 12, 2010 in Chicago. The skeleton was being cleaned in anticipation of her 10th anniversary at the museum. (AP Photo/Kiichiro Sato) ( APTOPIX Dinosaur Cleaning )

Workers move a shipping case at the Museum of Natural Science after installing Sue, claimed to be the largest, most complete, and best preserved Tyrannosaurus rex, in Halifax on Wednesday, Jan. 12, 2011. Sue is named for paleontologist Sue Hendrickson, who discovered the dinosaur remains during a fossil-hunting trip in the summer of 1990. (AP Photo/The Canadian Press, Andrew Vaughan) ( Canada T Rex Exhibit )

TOKYO, JAPAN: David Hanke, an officer from the Exhibition Department of the Field Museum in the US city of Chicago, makes final touches on the skull of the world's largest Tyrannosaurus Rex, Sue, on display at the Dinosaur Expo 2005 at the National Science Museum in Tokyo, 14 March 2005. Sue was discovered by fossil hunter Sue Hendrickson in 1990 and purchased by the Field Museum in Chicago at public auction in 1997. (TOSHIFUMI KITAMURA/AFP/Getty Images) ( HKG2005031403226 )

TOKYO, JAPAN: The skull of the world's largest Tyrannosaurus Rex, named Sue, is placed onto its skeleton as workers prepare it for display in the Dinosaur Expo 2005 at the National Science Museum in Tokyo, 14 March 2005. Sue was discovered by fossil hunter Sue Hendrickson in 1990 and purchased by the Field Museum in Chicago at public auction in 1997. (TOSHIFUMI KITAMURA/AFP/Getty Images) ( HKG2005031403259 )

TOKYO, JAPAN: Workers check the display of the world's largest Tyrannosaurus Rex, named Sue, after competing its assembly for the Dinosaur Expo 2005 at the National Science Museum in Tokyo, 14 March 2005. Sue was discovered by fossil hunter Sue Hendrickson in 1990 and purchased by the Field Museum in Chicago at public auction in 1997. (TOSHIFUMI KITAMURA/AFP/Getty Images) ( HKG2005031403288 )

A worker moves a shipping case at the Museum of Natural Science after installing Sue, claimed to be the largest, most complete, and best preserved Tyrannosaurus rex, in Halifax on Wednesday, Jan. 12, 2011. Sue is named for paleontologist Sue Hendrickson, who discovered the dinosaur remains during a fossil-hunting trip in the summer of 1990. (AP Photo/The Canadian Press, Andrew Vaughan) ( Canada T Rex Exhibit )

Visitors occupy a balcony at the Field Museum to get a birds-eye view of Sue, the largest and most complete Tyrannosaurus rex ever found May 10, 2000 in Chicago. The fossil was found by Susan Hendrickson in South Dakota in 1990 and was acquired by The Field Museum in 1997 for $8.4 million at Sotheby's auction house in New York. (Photo by Tim Boyle/Newsmakers) ( 3695524sue20_20010702_04764.jpg )

LONDON - MARCH 18: An adult Tyrannosaurs Rex robotic dinosaur performs for the media in the O2 arena ahead of the forthcoming European leg of the live show 'Walking With Dinosaurs' on March 18, 2009 in London, England. The live arena show, which has already toured throughout North America, tours the UK from July 2009. The £10 million show features 15 mechanical life-sized dinosaurs and is based upon the hit BBC TV series of the same name. (Photo by Oli Scarff/Getty Images) ( 56998069 )

LAS VEGAS - SEPTEMBER 30: A 66-million-year-old Tyrannosaurus rex skeleton dubbed "Samson" is displayed at the Venetian Resort Hotel Casino September 30, 2009 in Las Vegas, Nevada. The 40-foot-long female dinosaur fossil, excavated in South Dakota in 1992, contains about 170 bones and is said to be the third most complete T. rex skeleton ever unearthed. The skull currently mounted on the display is a cast replica of the 450-pound original. Thomas Lindgren, co-consulting department director of Natural History at auctioneers Bonhams & Butterfields, said the original is being displayed separately for safety reasons and as it is one of the most intact in existence makes it completely available for scientific research. Bonhams & Butterfields is hoping Samson will fetch more than USD 6 million when it is auctioned off as the centerpiece of a lot of 50 fossils on October 3 at the Venetian as part of their Natural History auction. (Photo by Ethan Miller/Getty Images) ( 58523135 )

LAS VEGAS - SEPTEMBER 30: A 66-million-year-old Tyrannosaurus rex skeleton dubbed "Samson" is displayed at the Venetian Resort Hotel Casino September 30, 2009 in Las Vegas, Nevada. The 40-foot-long female dinosaur fossil, excavated in South Dakota in 1992, contains about 170 bones and is said to be the third most complete T. rex skeleton ever unearthed. The skull currently mounted on the display is a cast replica of the 450-pound original, seen at left. Thomas Lindgren, co-consulting department director of Natural History at auctioneers Bonhams & Butterfields, said the original is being displayed separately for safety reasons and as it is one of the most intact in existence makes it completely available for scientific research. Bonhams & Butterfields is hoping Samson will fetch more than USD 6 million when it is auctioned off as the centerpiece of a lot of 50 fossils on October 3 at the Venetian as part of their Natural History auction. (Photo by Ethan Miller/Getty Images) ( 58523311 )

SYDNEY, AUSTRALIA - OCTOBER 18: at A Tyrannosaurus Rex dwarfs a small boy at the media call for Walking With Dinosaurs - The Arena Spectacular at The Entertainment Quarter on October 18, 2010 in Sydney, Australia. The arena show featuring life-sized dinosaurs returns to Australia after a successful world tour. (Photo by Brendon Thorne/Getty Images) ( 62092093 )

A life-size figure of a Tyranosaurus Rex is pictured at Sarajevo Zoo on February 8, 2012. Helicopters ferried food and medicine to iced-in villagers on Wednesday as Europe's 12-day-old cold snap tightened its frigid grip on the continent, where more than 400 have died as a direct result. AFP PHOTO / ELVIS BARUKCIC (Photo credit should read ELVIS BARUKCIC/AFP/Getty Images) ( Par6844876 )

SUNSHINE COAST, AUSTRALIA - DECEMBER 13: A large model T-Rex dinosaur named Jeff is seen during round one of the Australian PGA at the Palmer Coolum Resort on December 13, 2012 in Sunshine Coast, Australia. (Photo by Bradley Kanaris/Getty Images) ( 151099933BK007_Australian_P )

SINGAPORE - JANUARY 09: People view a sculpture of a Tyrannosaurus Rex made out of Lego at the 'The Art of the Brick' exhibition on January 9, 2013 at the ArtScience Museum in Singapore. The exhibition by renowned New York based brick artist Nathan Sawaya features 52 large-scale LEGO brick sculptures and showcases two of the artists iconic pieces 'Yellow' and 'Swimmer'. It is the first time his work has been exhibited in South East Asia. The exhibit runs from 17 Nov 2012 to 14 April 2013. (Photo by Chris McGrath/Getty Images) ( 159304418CM013_The_Art_Of_B )

NEW YORK, NY - JUNE 18: A 20-foot T-Rex dinosaur skeleton, a Nathan Sawaya sculpture, is displayed in the 'Art of the Brick' show at Discovery Times Square on June 18, 2013 in New York City. Sawaya created the pieces entirely with LEGO toy bricks and the exhibition features over 100 works of art created from millions of the toy bricks. (Photo by Mario Tama/Getty Images) ( 170896404MT009_ARTIST_CREAT )

A giant chrome brushed aluminium skeleton of a Tyrannosaurus (T-Rex) dinosaur (L), made by French sculptor and painter Philippe Pasqua, stands at the pier of riverboat company Bateaux-Mouches on June 12, 2013 in Paris, with the Eiffel tower in the background (R). (CLAIRE LEBERTRE/AFP/Getty Images) ( Par7583899 )

NEW YORK - MAY 10: A full size cast skeleton of a Tyrannosaurus rex is displayed at the new exhibit "Dinosaurs: Ancient Fossils, New Discoveries" at the American Museum of Natural History May 10, 2005 in New York City. The exhibit, which will open to the public on May 14 and run to January 8, uses recent fossil finds, computer simulations and life size models to trace changes in the thinking about dinosaur biology over the past two decades. (Photo by Spencer Platt/Getty Images) ( 52779223SP008_Dinosaurs )

Tyrannosaurus rex bones are on display at the Perot Museum of Nature and Science during a media preview in Dallas, Wednesday, Nov. 14, 2012. The museum set to open Dec. 1 was named for billionaire former presidential candidate Ross Perot and his wife, Margot, after their five children made a $50 million gift in honor of them. (AP Photo/LM Otero) ( Perot Science Museum )

FILE - In this Dec. 11, 2012 file photo, people stand near an eight-meter (26-foot) replica of a tyrannosaurus rex standing between the 9th green and the 10th tee at the Sunshine Coast resort course in south Queensland, Australia. The PGA of Australia confirmed, Monday, Feb. 11, 2013, it will move the venue of its PGA Championship, which was overshadowed last year by the billionaire resort owner's decision to position a giant robotic dinosaur outside the clubhouse and post unusual signage around the course. (AP Photo/Dennis Passa, File) ( Australian PGA Move )

In this Friday, May 25, 2012 file photo, children stand near a life-size Tyrannosaurus Rex dinosaur model as it moves and growls in an interactive display at Field Station Dinosaurs in Secaucus, N.J. Scientists used to think T. rex stood tall, but they abandoned that idea decades ago. Now, the ferocious dinosaur is depicted in a bird-like posture, tail in the air and head pitched forward of its two massive legs. (AP Photo/Mel Evans) ( Blame Barney )

SYDNEY, AUSTRALIA: Palaeontologist Robert Jones examines the jaw of a nine-metre Tyrannosaurus-rex at the Australian Museum in Sydney 08 October which will feature in "Terrorsaurus." The exhibition, which runs from 31 October 1998 to 25 April 1999, will have 13 interactive dinosaurs which move, make sounds and are situated in life-like environments. (TORSTEN BLACKWOOD/AFP/Getty Images) ( SAHK981008347440 )

The pelvic bone of a nearly complete skeleton of a juvenile Tyrannosaurus rex is seen at the excavation site in western South Dakota in this undated handout photo. The skeleton of the dinosaur is being prepared for study in a Texas laboratory, researchers said Tuesday Nov 30, 1999. Scientists had never found a complete skeleton of a juvenile Tyrannosaurus rex. (AP Photo) ( T REX )

402200 09: Two visitors stop to look at Sue- the largest, most complete, and best preserved Tyrannosaurus Rex fossil yet discovered - outside the "Tiniest Giants: Discovering Dinosaur Eggs" exhibit March 12, 2002 at Chicagos Field Museum. The exhibit comes from the 1997 discovery in southern Argentina of the largest nesting site of dinosaur eggs ever found. More than a mile square, the site held tens of thousands of eggs, some containing fossilized embryos so well preserved the scientists could see patterns of reptilian scales in their skin. "Tiniest Giants: Discovering Dinosaur Eggs" was developed by the Natural History Museum of Los Angeles County and the Carmen Funes Museum of Argentina. The exhibit is open at the Field Museum through September 2, 2002. (Photo by Tim Boyle/Getty Images) ( 40220009dino_20020318_01907.jpg )