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militant Marxist-Leninist terrorist organization formed in 1975 to force Turkey to acknowledge killing more than a million Armenians and forcibly removing them from border areas in 1915; wants Turkey to pay reparations and cede territory to Armenia 3rd October Organization , Armenian Secret Army for the Liberation of Armenia , ASALA , Orly Group
(chemistry) the ratio of the total mass of an element in the earth's crust to the total mass of the earth's crust; expressed as a percentage or in parts per million abundance
extinct small mostly diurnal lower primates that fed on leaves and fruit; abundant in North America and Europe 30 to 50 million years ago; their descendents probably include the lemurs; some authorities consider them ancestral to anthropoids but others co Adapid , Adapid group
extinct primate of about 38 million years ago; fossils found in Egypt Aegyptopithecus
from 405 million to 345 million years ago; dominance of fishes and appearance of amphibians and ammonites Age of Fishes , Devonian , Devonian period
approximately the last 63 million years Age of Mammals , Cenozoic , Cenozoic era
last 2 million years Age of Man , Quaternary , Quaternary period
from 230 million to 63 million years ago Age of Reptiles , Mesozoic , Mesozoic era
tiny (150 to 300 grams) extinct primate of 46 to 50 million years ago; fossils found in Algeria; considered by some authorities the leading candidate for the first anthropoid Algeripithecus minutus
time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life Archaeozoic , Archaeozoic aeon , Archean , Archean aeon , Archean eon , Archeozoic , Archeozoic eon
unit of length used for distances within the solar system; equal to the mean distance between the Earth and the Sun (approximately 93 million miles or 150 million kilometers) Astronomical Unit , AU
any of several extinct humanlike bipedal primates with relatively small brains of the genus Australopithecus; from 1 to 4 million years ago australopithecine
fossils found in Ethiopia; from 3.5 to 4 million years ago Australopithecus afarensis
gracile hominid of southern Africa; from about 3 million years ago Australopithecus africanus
large-toothed hominid of eastern Africa; from 1 to 2 million years ago Australopithecus boisei
large-toothed hominid of southern Africa; from 1.5 to 2 million years ago; formerly Paranthropus Australopithecus robustus
(meteorology) a unit of pressure equal to a million dynes per square centimeter bar
living fossil or so-called `green dinosaur'; genus or subfamily of primitive nut-bearing trees thought to have died out 50 million years ago; a single specimen found in 1994 on Mount Bartle Frere in eastern Australia; not yet officially named Bartle Frere , genus Bartle-Frere , green dinosaur
from 544 million to about 500 million years ago; marine invertebrates Cambrian , Cambrian period
from 345 million to 280 million years ago Carboniferous , Carboniferous period
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