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Common Era. Common Era ( CE) and Before the Common Era ( BCE) are year notations for the Gregorian calendar (and its predecessor, the Julian calendar ), the world's most widely used calendar era. Common Era and Before the Common Era are alternatives to the original Anno Domini (AD) and Before Christ (BC), notations used for the same calendar era.
General periods. Geologic Time – Period prior to humans. 4.6 billion to 3 million years ago. (See "prehistoric periods" for more detail into this.) Primatomorphid Era – Period prior to the existence of Primatomorpha. Simian Era – Period prior to the existence of Simiiformes. Hominoid Era – Period prior to the existence of Hominoidea.
The geologic time scale is a way of representing deep time based on events that have occurred throughout Earth's history, a time span of about 4.54 ± 0.05 Ga (4.54 billion years). [5] It chronologically organises strata, and subsequently time, by observing fundamental changes in stratigraphy that correspond to major geological or ...
Ithaca Commons. Coordinates: 42°26′22″N 76°29′50″W. Ithaca Commons west entrance, at Cayuga Street. The Ithaca Commons is a two-block [1] pedestrian mall in the business improvement district known as Downtown Ithaca that serves as the city's cultural and economic center. The Commons is a popular regional destination, and is filled ...
The chestnut-headed bee-eater ( Merops leschenaulti) is a bird in the bee-eater family, Meropidae, which is distributed in an area ranging from India, Bangladesh and Sri Lanka across Southeast Asia to Indonesia. It is 18–20 cm (7.1–7.9 in) in overall length and weighs 26–33 g (0.92–1.16 oz), with the sexes being similar in appearance.
Historical eras. Wikimedia Commons has media related to Historical eras. This category's scope is limited to human-related history since the end of Earth's most recent glacial period ("the Ice Age") around 10,000 to 15,000 years ago. See also. List of time periods, which includes periods used in fields such as palaeogeography, palaeoecology ...
Reactive armour is a type of vehicle armour used in protecting vehicles, especially modern tanks, against shaped charges and hardened kinetic energy penetrators. The most common type is explosive reactive armour (ERA), but variants include self-limiting explosive reactive armour (SLERA), non-energetic reactive armour (NERA), non-explosive ...
Copernicus's Toruń birthplace (ul. Kopernika 15, left).Together with no. 17 (right), it forms Muzeum Mikołaja Kopernika.Nicolaus Copernicus was born on 19 February 1473 in the city of Toruń (Thorn), in the province of Royal Prussia, in the Crown of the Kingdom of Poland, [10] [11] the son of a Polish father and a mother who was of mixed German-Polish descent.