Mammoth skull. Montanaceratops (65-70 million years). Wankel T-rex (65-68 million years). Wankel T-rex (65-68 million years). T-rex skull (world's largest). Edmontosaurus tail (58-65 million years). Embryonic remains of Troodon in egg. Troodon egg. Lambeosaurine egg clutch. Daspletosaurus and brachylophosaurus feet. T-rex skulls: young and adult. Typical Montana house (before WW2). Gold ore (Gold rush in Montana: 1860's). Fire extinguisher (1920's). Madison riverNevada City Labels