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Hace 5 días · A circadian rhythm ( / sərˈkeɪdiən / ), or circadian cycle, is a natural oscillation that repeats roughly every 24 hours. Circadian rhythms can refer to any process that originates within an organism (i.e., endogenous) and responds to the environment (is entrained by the environment).
Hace 2 días · An extract from the Cyrus Cylinder (lines 15–21), giving the genealogy of Cyrus the Great and an account of his capture of Babylon in 539 BC. The cuneiform sign "EN", for "Lord" or "Master": the evolution from the pictograph of a throne circa 3000 BC, followed by simplification and rotation down to circa 600 BC.
Hace 3 días · Circa See also: Wikipedia:Manual of Style/Dates and numbers § Uncertain, incomplete, or approximate dates for examples. To indicate approximately , the use of {{ circa }} , showing as c. , is preferred over circa, c., ca., or approx.
Hace 3 días · Winged Victory, ancient Roman fresco of the Neronian era from Pompeii. The Roman Empire under Hadrian (ruled 117–138) showing the location of the Roman legions deployed in 125 AD. After the Punic Wars, the Roman army comprised professional soldiers who volunteered for 20 years of active duty and five as reserves.
Hace 3 días · History of Europe. Europe by cartographer Abraham Ortelius in 1595. The history of Europe is traditionally divided into four time periods: prehistoric Europe (prior to about 800 BC), classical antiquity (800 BC to AD 500), the Middle Ages (AD 500–1500), and the modern era (since AD 1500).
Hace 2 días · The English word Germany derives from the Latin Germania, which came into use after Julius Caesar adopted it for the peoples east of the Rhine. The German term Deutschland, originally diutisciu land ('the German lands') is derived from deutsch (cf. Dutch), descended from Old High German diutisc 'of the people' (from diot or diota 'people'), originally used to distinguish the language of the ...
Hace 2 días · Ce pays possède 1 290 km de côtes, dont de vastes plaines qui bordent la mer des Caraïbes, sur presque un tiers du pays, et de plus étroites et plus découpées sur les côtes du Pacifique. Le principal fleuve du Costa Rica est le San Juan (230 km) qui délimite au nord une partie de la frontière avec le Nicaragua 40 .
