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212006 Lebanon War — For the First Lebanon War, see 1982 Lebanon War. 2006 Lebanon War Part of the Israeli Lebanese conflict and Arab Israeli co …
22Embolism — The obstruction of a blood vessel by a foreign substance or a blood clot blocking the vessel. Something travels through the bloodstream, lodges in a vessel and plugs it. Foreign substances that can cause embolism include an air bubble, amniotic… …
23Sex positions — are positions which people may adopt during or for the purpose of sexual intercourse or other sexual activities. Sexual acts are generally described by the positions the participants adopt in order to perform those acts. Though sexual intercourse …
24Serbia — Infobox Country native name = Република Србија Republika Srbija conventional long name = Republic of Serbia common name = Serbia| p1 = Yugoslavia flag p1 = Flag of Serbia and Montenegro.png s1 = flag s1 =| demonym = Serbian map caption = map… …
25ROT13 — replaces each letter by its partner 13 characters further along the alphabet. For example, HELLO becomes URYYB (or, rev …
26Caesar cipher — The action of a Caesar cipher is to replace each plaintext letter with one fixed number of places down the alphabet. This example is with a shift of three, so that a B in the p …
27River Severn — Geobox|River name = River Severn native name = other name = Welsh: Afon Hafren other name1 = Latin: Sabrina image size = 288 image caption = The Severn at Shrewsbury from Shrewsbury Castle. etymology = country = Wales country1 = England state =… …
28Cryptogram — For other uses, see Cryptogram (disambiguation). Not to be confused with cryptogam, the plants which reproduce by using spores. Example cryptogram. A cryptogram is a type of puzzle which consists of a short piece of encrypted text. Generally the… …
29Metalloid —   13 14 15 16 17   2  B Boron …
30Appalachian Trail — This article is about the trail. For the conservation group, see Appalachian Trail Conservancy. For the train station, see Appalachian Trail (Metro North station). Appalachian Trail Map of Appalachian Trail Length …
