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Daspletosaurus torosus, 132 Dating of rocks, 25-27 chemical, 27 radiometric, 25-27 Death of dinosaurs, cause of, 30-31 Descendents of dinosaurs, 124 Description of Tyrannosaurus rex, by Henry

Fairfield Osborn, 79-80 Diet of Tyrannosaurus rex amount eaten, 204-205 determination of, 203-204 Dig, Wankel Tyrannosaurus rex, Digging Dinosaurs, 17 Dinosaur effects on environment Dinosaur evolution, 123-141 Dinosaur Provincial Park, Alberta, Canada, 30 Dinosaur research, money for, 223-224 Dinosaur scientists, number of, 17 Discoverer of original Tyrannosaurus rex, 57 Discovery of new species of dinosaur, 17-18 Discovery of Tyrannosaurus rex, 57-77

individual discoveries, 64-65 Display of Tyrannosaurus rex by Charles R. Knight, 85-86 by Henry Fairfield Osborn, 80-83 Ditmars, Raymond L, 81-82 Dodson, Peter, 30, 173-174 Dorsal vertebrae of Tyrannosaurus rex, 119 Duckbilled dinosaur, 14 behavior and ecology of, 17 first found in North America, 22 found with "Sue," 72

Earthquakes, effect on discovery of dinosaurs, 19

Eating methods of Tyrannosaurus rex, 107109

Edmontosaurus, 72, 2 00 Egg of Tyrannosaurus rex, 17 Eggs, laid by Tyrannosaurus rex, 167 Enmontosaurus, 165 Environment of Tyrannosaurus rex animals, 157-165 description of habitat, 152 plant evidence, 143-152 weather, 153-157 Erickson, Greg, 110-111

Erosion, effect on discovery of dinosaurs, M Evolution defined, 123

of dinosaurs, patterns of change, 140 of Tyrannosaurus rex, 123-141 Extinction of dinosaurs, 18, 20-21

asteroids, caused by, 155-156 Eyesight of Tyrannosaurus rex, 188

Farlow, Jim, 179, 196, 199 Femur of Tyrannosaurus rex, 120 Films, Tyrannosaurus rex in, 86 Finding dinosaurs methods, 29-30 methods of, 22 success at, 22-24 what to look for, 24 where to look, 24-25 Footprint of Tyrannosaurus rex, 17 Footprints of dinosaurs, 195-197 Forelimbs of Tyrannosaurus rex, 80 Fort Peck Reservoir, 33 Fossil cleanup expense of, 99 waiting list for, 99 Fossil plant evidence for Tyrannosaurus rex, 143-152

Fossil preparation in lab, 101-102 bone cleaning, 102 equipment, 101-102 separate preparation of each bone, 102 Fossils bones v. plants, 153-154 of dinosaurs, environments for, 18 market for, 75-76

species identification from, 128-129 of Tyrannosaurus rex, conditions for, 28-29 Foster, John, 39 Franczak, Brian, 93 Frey, Dr. Eberhard "Dino," 176 Fricke, Charles, 74

Garbani, Harley, 64, 66-67 Garfield County, Montana, 33 Geiger counters, for finding dinosaurs, 29 Genera (kinds) of dinosaurs, 17, 128-129 Gentry, Allison, 39 Gillette, Dave, 29 Gilmore, Charles, 133 Gorgosaurus lancensis, 136 Gorgosaurus libratus, 132 Gorgosaurus sternbergi, 132 Growth patterns of Tyrannosaurus rex, 168169

Gurche, John, 93

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