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Ankylosaurus

(Encyclopedia) AnkylosaurusAnkylosaurusănˌkələsôrˈəs [key], [Gr.,=crooked lizard], genus of heavily armored, herbivorous quadripedal dinosaurs, the best known of which is the species A. magniventris…

Pachycephalosaurus

(Encyclopedia) PachycephalosaurusPachycephalosauruspăkˌĭsĕfˌəlōsôrˈəs [key] [Gr., = thick-headed lizard], bipedal herbivorous dinosaur of the late Cretaceous period, approximately 68–65 million years…

Nye, Edgar Wilson

(Encyclopedia) Nye, Edgar WilsonNye, Edgar Wilsonnī [key], known as Bill Nye, 1850–96, American humorist and journalist, b. Shirley Mills, Maine. He lived in Wisconsin from 1852 to 1876, when he went…

Casper

(Encyclopedia) Casper, city (2020 pop. 59,038), alt. 5,123 ft (1,561 m), seat of Natrona co., E central Wyo., on the North Platte River; inc. 1889. It…

Oligocene epoch

(Encyclopedia) Oligocene epochOligocene epochŏlˈəgōsēnˌ [key], third epoch of the Tertiary period in the Cenozoic era of geologic time, lasting from 38 to 24 million years ago. More of North America…

state flowers

(Encyclopedia) state flowers. Each state of the United States has designated, usually by legislative action, one flower as its floral emblem; the rose has been designated by Congress as the national…

jade

(Encyclopedia) jade, common name for either of two minerals used as gems. The rarer variety of jade is jadeite, a sodium aluminum silicate, NaAl(SiO3)2, usually white or green in color; the green…

joint, in geology

(Encyclopedia) joint, in geology, fracture in rocks along which no appreciable movement has occurred (see fault). Nearly vertical, or sheet, joints that result from shrinkage during cooling are…