7 (seven) is a number, numeral, and glyph that represents the number. it is the natural number  that follows 6 and precedes 8. it is an integer and a cardinal number, that is, a number that is used for counting.  in addition, it is classified as a real number,  distinguishing it from imaginary numbers.
Abū ʿAlī al-Ḥasan ibn al-Ḥasan ibn al-Haytham (Arabic: أبو علي الحسن بن الحسن بن الهيثم, Latinized: Alhacen or (deprecated) Alhazen ) (965 - 1039), was an Arab  or Persian  Muslim polymath who made significant contributions to the principles of optics, as well as to anatomy, astronomy, engineering, mathematics, medicine, ophthalmology, philosophy, physics, psychology, visual perception, and to science in general with his introduction of the scientific method.
Eschatology (from the Greek έσχατος, "last, ultimate, end" and logy, teaching), simply translated as “discourse about the last things,” generally reflects the quest for an ultimate human purpose on the individual and the cosmic levels. The driving force of seeking answers to such a twofold human purpose is confirmed by the two major themes of eschatological inquiry, namely, life after death and the final stage of the world.
Previous (Elizabeth Barrett Browning) Next (Elizabeth Blackwell) Elizabeth Bishop (February 8, 1911 - October 6, 1979), was an American poet and writer, increasingly regarded as one of the finest twentieth-century poets writing in English. Bishop has always been regarded highly by critics and connoisseurs of poetry (James Merill referred to her charmingly as a "poet's poet's poet"), but only within recent decades has her stock risen among general readers.
Currency is used to facilitate trade by establishing standard values for items, removing the barrier of direct barter. In common usage, "currency" sometimes refers to only paper money, as in "coins and currency," but this is misleading. Coins and paper money are both forms of currency. A currency zone is a country or region in which a specific currency is the dominant medium of exchange.
Jurassic period 200 - 145 million years ago PreЄ Є O S D C P T J K Pg N Key events in the Jurassic period -200 - - -195 - - -190 - - -185 - - -180 - - -175 - - -170 - - -165 - - -160 - - -155 - - -150 - - -145 - - Cretaceous Triassic Jurassic Hettangian Sinemurian Pliensbachian Toarcian Aalenian Bajocian Bathonian Callovian Oxfordian Kimmeridgian Tithonian J u r a s s i c p e r i o d Mesozoic era An approximate timescale of key Jurassic events.