Apparent horizon — An apparent horizon is a surface defined in general relativity as the boundary between light rays which are directed outwards and moving outwards, and those which are directed outwards but moving inwards.Apparent horizons are not invariant… … Wikipedia
Penrose-Hawking singularity theorems — The Penrose Hawking singularity theorems are a set of results in general relativity which attempt to answer the question of whether gravity is necessarily singular. These theorems answer this question affirmatively for matter satisfying… … Wikipedia
General relativity — For a generally accessible and less technical introduction to the topic, see Introduction to general relativity. General relativity Introduction Mathematical formulation Resources … Wikipedia
Sago Mine disaster — wikinewshas|three articles on the accident * * *The Sago Mine disaster was a coal mine explosion on January 2, 2006, in the Sago Mine (pronEng|ˈseɪgoʊ) in Sago, West Virginia, USA near the Upshur County seat of Buckhannon. The blast and ensuing… … Wikipedia
List of Ben 10: Alien Force episodes — This is a list of episodes in the American animated television series Ben 10: Alien Force. A total of 46 episodes have been produced and aired. [1] At the 2008 Comic Con, series producers revealed the show was picked up for a third season. The… … Wikipedia
Ecology — For other uses, see Ecology (disambiguation). Ecology … Wikipedia
Thermodynamic temperature — is the absolute measure of temperature and is one of the principal parameters of thermodynamics. Thermodynamic temperature is an “absolute” scale because it is the measure of the fundamental property underlying temperature: its null or zero point … Wikipedia
Mode series — The Mode series is a quartet of novels by Piers Anthony. Like many of Anthony’s other fictional works, it explores themes of violence, the abuse of power, sexism and male dominance, gender roles, the environment, integrity and personal honor,… … Wikipedia
List of Torchwood characters — The following is a list of characters in the BBC science fiction television series Torchwood, including supporting characters, and important human villains. Main articles Captain Jack Harkness Main article: Jack Harkness Captain Jack Harkness,… … Wikipedia
List of devices used by Doctor Doom — This article lists devices used by the Doctor Doom, a fictional supervillain of the Marvel Comics universe and enemy of the Fantastic Four. Over the course of his appearances, Doom has used over 100 devices, many of which he also invented.… … Wikipedia
