hypothetical worlds

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• Hypothetical types of biochemistry — are forms of biochemistry speculated to be scientifically viable but not proven to exist at this time. While the kinds of living beings we know on earth commonly use carbon for basic structural and metabolic functions, water as a solvent and DNA… …   Wikipedia

• Many-worlds interpretation — The quantum mechanical Schrödinger s cat paradox according to the many worlds interpretation. In this interpretation every event is a branch point; the cat is both alive and dead, even before the box is opened, but the alive and dead cats are in… …   Wikipedia

• New Worlds Mission — Starshade. The New Worlds Mission is a project planning to build a large occulter in space designed to block the light of nearby stars in order to observe their orbiting planets. The observations could be taken with an existing space telescope,… …   Wikipedia

• Vulcan (hypothetical planet) — Vulcan was a small planet proposed to exist in an orbit between Mercury and the Sun in a 19th century hypothesis. This hypothesis has now been rendered obsolete by Albert Einstein s theory of general relativity.Argument for Vulcan s existenceIn… …   Wikipedia

• Tollmann's hypothetical bolide — Alexander Tollmann s bolide, proposed by Kristen Tollmann and Tollmann (1994), is a hypothesis presented by Austrian geologist Dr. Alexander Tollmann, suggesting that one or several bolides (asteroids or comets) struck the Earth at 7640 BCE… …   Wikipedia

• Aesthetics — or esthetics (also spelled æsthetics) is commonly known as the study of sensory or sensori emotional values, sometimes called judgments of sentiment and taste. [Zangwill, Nick. [http://plato.stanford.edu/entries/aesthetic judgment/ Aesthetic… …   Wikipedia

• P versus NP problem — Unsolved problems in computer science Is P = NP ? …   Wikipedia

• extraterrestrial intelligence — ▪ hypothetical lifeform       hypothetical extraterrestrial life that is capable of thinking, purposeful activity. Work in the new field of astrobiology has provided some evidence that evolution of other intelligent species in the Milky Way… …   Universalium

• Extraterrestrial 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 …   Wikipedia

• Habitable zone — Goldilocks planet redirects here. For the planet initially nicknamed Goldilocks , see 70 Virginis b. For other uses, see Goldilocks (disambiguation). Goldilocks Zone and Comfort zone (astronomy) redirect here. For other uses, see Comfort zone… …   Wikipedia

• applied logic — Introduction       the study of the practical art of right reasoning. The formalism (formal logic) and theoretical results of pure logic can be clothed with meanings derived from a variety of sources within philosophy as well as from other… …   Universalium