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Ilium of Tyrannosaurus rex, 120 Indiana, dinosaurs in, 19 Infrared cameras, for finding dinosaurs, 29 Intelligence of Tyrannosaurus rex, 187 Interaction among Tyrannosaurus rexes, 170-171

Ischium of Tyrannosaurus rex, 119 J

Jawbone of Tyrannosaurus rex, 107-109 Jensen, "Dinosaur" Jim, 99 Johnson, Kirk, 149, 155 Jordan, Montana, 57 Jurassic period, dinosaurs in, 126 K

Kinds (genera) of dinosaurs, 17, 128-129 King Kong, Tyrannosaurus rex in, 86 Knight, Charles R., 83-86 Kurzanov, Sergei, 133

Lagosuchus, 124 Lambe, Lawrence, 132 Langston, Wann, 69 Larson, Pete, 70 diet of Tyrannosaurus rex, 203

discovery of a Tyrannosaurus rex by, 65, 73-74

sex differentiation of dinosaurs, 176 Leaves, fossil, 145-146 Leiggi, Pat, 35-39, 42-47, 49, 51, 55 Leptoceratops, 160

Life span of Tyrannosaurus rex, 168-169 Limbs of Tyrannosaurus rex, 199 Little predators, 14 "Lizard hips," 125 Lorenz, Konrad, 169

Mader, Bryn, 131

Magnets, for finding dinosaurs, 29

Makela, Bob, 42

Maiasaurus, 167-168

Maleev, Evgeny, 133

Mammals, and dinosaurs, 160-163

Market for fossils, 75-76

Mass of Tyrannosaurus rex, 198

Matthew, William Diller, 132

McCone County, Montana, 33

McKamey, Bill, 100

McKamey, Shelley, 40

McMullen, Brad, 40

Meat eaters, 29, 160

Metabolism of dinosaurs, 180-187

Metasequoia, 152

Mississippi Delta, dinosaur fossils and, 18 Molnar, Ralph, 57, 105-106 bumps on Tyrannosaurus rex skulls, 173174

Montana Garfield County, 33 McCone County, 33 Montana, Eastern dinosaur fossils and, 18-19 erosion in, 19-22

reason for Tyrannosaurus rex in, 25 Mounting of Tyrannosaurus rex expense of, 91-92 by Henry Fairfield Osborn, 80-83 at museums, 88-91 problems with, 88-89 Muscles of Tyrannosaurus rex, tail, 192-193 Museum of the Rockies, 34

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