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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…baluchitherium
(Encyclopedia) baluchitheriumbaluchitheriumbəl&oomacr;chĭthērˈēəm [key], extinct primitive rhinoceros, belonging to the genus Baluchitherium, of the Oligocene epoch, fossilized bones of which…mastodon
(Encyclopedia) mastodonmastodonmăsˈtədŏnˌ [key], name for a number of prehistoric mammals of the extinct genus Mammut, from which modern elephants are believed to have developed. The earliest known…turkey , in zoology
(Encyclopedia) turkey, common name for a large game and poultry bird related to the grouse and the pheasant. Its name derives from its “turk-turk” call. Turkeys are indigenous to the New World;…Miocene epoch
(Encyclopedia) Miocene epochMiocene epochmīˈəsēn [key], fourth epoch of the Tertiary period in the Cenozoic era of geologic time (see Geologic Timescale, tablegeologic timescale, table), lasting from…Tertiary period
(Encyclopedia) Tertiary periodTertiary periodtûrˈshēĕrˌē [key], name for the major portion of the Cenozoic era, the most recent of the geologic eras (see Geologic Timescale, tablegeologic timescale,…Table of Geological Periods
It is generally assumed that planets are formed by the accretion of gas and dust in a cosmic cloud, but there is no way of estimating the length of this process. Our Earth acquired its present size…Geologic Timescale (table)
(Encyclopedia) Geologic Timescale Era Period Epoch Approximate duration (millions of years) Approximate number of years ago (millions of years) Cenozoic Quaternary Holocene 10,000 years ago to…Alps
(Encyclopedia) Alps, great mountain system of S central Europe, c.500 mi (800 km) long and c.100 mi (160 km) wide, curving in a great arc from the Riviera coast on the Mediterranean Sea, along the…human evolution
(Encyclopedia) human evolution, theory of the origins of the human species, Homo sapiens. Modern understanding of human origins is derived largely from the findings of paleontology, anthropology, and…Trending
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