preliminary drilling
41Petroleum politics — Argentine president Néstor Kirchner and Venezuelan President Hugo Chávez discuss the Gran Gasoducto del Suran energy and trade integration project for South America. They met on November 21, 2005 in Venezuela. Petroleum politics have been an… …
42United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …
43Methane clathrate — Burning ice . Methane, released by heating, burns; water drips. Inset: clathrate structure (University of Göttingen, GZG. Abt. Kristallographie). Source: United States Geological Survey. Methane clathrate, also called methane hydrate,… …
44Dependent States — ▪ 2009 Introduction Europe and the Atlantic. For a list of populated Dependent States, see Table (Dependent States). In May 2008 Ilulissat, Greenland, was the site of an international summit on Arctic sovereignty attended by official… …
45Magnetometer — A magnetometer is a measuring instrument used to measure the strength or direction of a magnetic field either produced in the laboratory or existing in nature. Some countries such as the USA, Canada and Australia classify the more sensitive… …
46List of Chinese inventions — A bronze Chinese crossbow mechanism with a buttplate (the wooden components have …
47List of characters in Transformers (film series) — The following is a list of characters featured in the Transformers film series, directed by Michael Bay and distributed by Paramount Pictures. Contents 1 Humans 1.1 Sam Witwicky 1.2 Mikaela Banes 1.3 …
48Diamond — This article is about the mineral. For the gemstone, see Diamond (gemstone). For other uses, including the shape ◊, see Diamond (disambiguation) …
49Dental implant — Intervention A Straumann brand root form endosseous dental implant placed in the site of the maxillary left permanent first molar with bone graft used to elevate the sinus floor …
50Mittelplate — Mittelplate …
