arbitrary landing distance
51Propeller — A propeller is essentially a type of fan which transmits power by converting rotational motion into thrust for propulsion of a vehicle such as an aircraft, ship, or submarine through a mass such as water or air, by rotating two or more twisted… …
52Dates of 2006 — ▪ 2007 January Keeping America competitive requires affordable energy. And here we have a serious problem. America is addicted to oil, which is often imported from unstable parts of the world. U.S. Pres. George W. Bush, in his state of the union… …
53Azores — This article is about the archipelago. For the area of high pressure, see Azores High. Coordinates: 37°44′28″N 25°40′32″W / 37.74111°N 25.67556°W …
54Extraterrestrial life — For fiction, see Extraterrestrials in fiction. For other uses, see Alien (disambiguation). A 1967 Soviet Union 16 kopeks postage stamp, depicting a satellite from an imagined extraterrestrial civilization …
55History of Portugal — This article is part of a series Prehistoric Iberi …
56The Mote in God's Eye —   …
57Flag of Armenia — Name …
58Battle of the Alamo — Infobox Military Conflict conflict=The Battle of the Alamo partof=the Texas Revolution (against Mexico) caption=Plan of the Alamo, by José Juan Sánchez Navarro, 1836. date=February 23 ndash;March 6, 1836 place=San Antonio, Texas result=Mexican… …
59History of British Columbia — British Columbia is the westernmost province in Canada. Indigenous peoples have inhabited the territory that is now called British Columbia , as described in their oral traditions, from time immemorial. There are claims by the English to have… …
60Rafael Maroto — Infobox Person name=Rafael Maroto caption=Rafael Maroto with his niece Margarita Borgoño, painting by Raymond Monvoisin birth date=birth date|1783|10|15|mf=y dead=dead birth place=Lorca, Spain death date=death date and age|1853|8|25|1783|10|15|mf …
