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21Titan (moon) — Titan Titan in 2005 by Cassini spacecraft Discovery Discovered by Christiaan Huygens …
22List of photographic equipment makers — This list of photographic equipment makers lists companies that manufacture (or license manufacture from other companies) equipment for photography. Camera and lens manufacturers Note that producers whose only presence in the photo industry at… …
23Active pixel sensor — An active pixel sensor (APS) is an image sensor consisting of an integrated circuit containing an array of pixel sensors, each pixel containing a photodetector and an active amplifier. There are many types of active pixel sensors including the… …
24Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …
25Mammoth Cave National Park — Mammoth Cave redirects here. For other uses, see Mammoth Cave (disambiguation). Mammoth Cave National Park IUCN Category II (National Park) The Rotund …
26Optical microscope — Microscope Uses Small sample observation Notable experiments Discovery of cells Inventor Hans Lippershey Zacharias Jans …
27Tulpa — Part of a series on Tibetan Buddhism …
28Matrix-assisted laser desorption/ionization — MALDI TOF mass spectrometer Matrix assisted laser desorption/ionization (MALDI) is a soft ionization technique used in mass spectrometry, allowing the analysis of biomolecules (biopolymers such as DNA, proteins, peptides and sugars) and large… …
29Michael John Smith (espionage) — For other people named Michael Smith, see Michael Smith (disambiguation). Michael John Smith was born on 22 September 1948. He was charged in the UK with four offences under sections 1(1)(b) and (c) the Official Secrets Act 1911 in 1992 and… …
30AT&T — This article is about the company known as AT T since 2005 and formerly SBC. For the original AT T founded in 1885, see AT T Corporation. For the mobile telephony provider, see AT T Mobility. For other uses, see AT T (disambiguation). AT T Inc.… …
