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English Wikipedia references for Sciencenews.org 41-60 of 500
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| Spider Spiders (order Araneae) are air-breathing chelicerate arthropods that have eight legs, and chelicerae modified into fangs that inject venom. Spiders are found world-wide on every continent except for Antarctica, and have become established in nearly every ecological niche with the exception of air and sea colonization. Spider | |
| Hubble Space Telescope The Hubble Space Telescope (HST) is a space telescope that was carried into orbit by the space shuttle in April 1990. It is named after the American astronomer Edwin Hubble. Although not the first space telescope, the Hubble is one of the largest and most versatile, and is well-known as both a vital research tool and a public relations boon for astronomy. Hubble_Space_Telescope | |
| Circular polarization electrodynamics, circular polarization (also circular polarisation) of electromagnetic radiation is a polarization such that the tip of the electric field vector, at a fixed point in space, describes a circle as time progresses. The electric vector, at one point in time, describes a helix along the direction of wave propagation (see the polarization article for pictures). Circular_polarization | |
| Anthrax Anthrax is an acute disease caused by Bacillus anthracis. It affects both humans and animals and most forms of the disease are highly lethal. There are effective vaccines against anthrax, and some forms of the disease respond well to antibiotic treatment.Like many other members of the genus Bacillus, Bacillus anthracis can form dormant spores that are able to survive in harsh conditions for extremely long periods of time—even decades or centuries. Anthrax | |
| Gene Talk:Gene | |
| Europa (moon) Europa_(moon) | |
| Star formation Star formation is the process by which dense parts of molecular clouds collapse into a ball of plasma to form a star. As a branch of astronomy star formation includes the study of the interstellar medium and giant molecular clouds (GMC) as precursors to the star formation process and the study of young stellar objects and planet formation as its immediate products. Star_formation | |
| Forensic science Forensic science (often shortened to forensics) is the application of a broad spectrum of sciences to answer questions of interest to a legal system. This may be in relation to a crime or a civil action. Besides its relevance to a legal system, more generally forensics encompasses the accepted scholarly or scientific methodology and norms under which the facts regarding an event, or an artifact, or some other physical item (such as a corpse) are ascertained as being the case. Forensic_science | |
| Penrose tiling A Penrose tiling is a nonperiodic tiling generated by an aperiodic set of prototiles named after Sir Roger Penrose, who investigated these sets in the 1970s. reflection symmetry and fivefold rotational symmetry, as in the diagram at the right, and the term Penrose tiling usually refers to them.A Penrose tiling has many remarkable properties, most notably It is nonperiodic, which means that it lacks any translational symmetry. Penrose_tiling | |
| Photosynthesis Talk:Photosynthesis | |
| 243 Ida 243_Ida | |
| Contrail Contrail | |
| Gravitational lens A gravitational lens is formed when the light from a very distant, bright source (such as a quasar) is "bent" around a massive object (such as a cluster of galaxies) between the source object and the observer. The process is known as gravitational lensing, and is one of the predictions of Albert Einstein's general theory of relativity. Gravitational_lens | |
| Fine-structure constant Talk:Fine-structure_constant | |
| Areca nut Areca nut is the seed of the Areca palm (Areca catechu), which grows in much of the tropical Pacific, Asia, and parts of east Africa. Areca_nut | |
| Melanin Melanin (Greek μέλας, black; ) is a class of compounds found in plants, animals, and protists, where it serves predominantly as a pigment. The class of pigments are derivatives of the amino acid tyrosine. Many melanins are insoluble salts and show affinity to water. Melanin | |
| Ancient history "Ancient" redirects here. For other uses, see Antiquity. The times before writing belong either to protohistory or to prehistory.Ancient history is the study of the written past from the beginning of recorded human history in the Old World until the Early Middle Ages in Europe and the Qin Dynasty in China.The period following these events includes the Imperial era in China and the period of the Middle Kingdoms in India;recorded history altogether is roughly 5,000 years, with Sumerian cuneiform emerging from the protoliterate period around the 30th century BC being the oldest form of writing discovered so far. Ancient_history | |
| Dog/Archive 2 Talk:Dog/Archive_2 | |
| Pressure cooking Pressure cooking is a method of cooking in a sealed vessel that does not permit air or liquids to escape below a preset pressure. Because the boiling point of water increases as the pressure increases, the pressure built up inside the cooker allows the liquid in the pot to rise to a higher temperature before boiling. Pressure_cooking | |
| Betelgeuse Betelgeuse |
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