Portal:Science
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Science is a strict systematic discipline that builds and organizes knowledge in the form of testable hypotheses and predictions about the world. Modern science is typically divided into three major branches: the natural sciences (e.g., physics, chemistry, and biology), which study the physical world; the social sciences (e.g., economics, psychology, and sociology), which study individuals and societies; and the formal sciences (e.g., logic, mathematics, and theoretical computer science), which study formal systems, governed by axioms and rules. There is disagreement whether the formal sciences are scientific disciplines, as they do not rely on empirical evidence. Applied sciences are disciplines that use scientific knowledge for practical purposes, such as in engineering and medicine. (Full article...)
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Rodents (from Latin rodere, 'to gnaw') are mammals of the order Rodentia (/roʊˈdɛnʃə/ roh-DEN-shə), which are characterized by a single pair of continuously growing incisors in each of the upper and lower jaws. About 40% of all mammal species are rodents. They are native to all major land masses except for Antarctica, and several oceanic islands, though they have subsequently been introduced to most of these land masses by human activity. (Full article...)
The alpine newt (Ichthyosaura alpestris) is a species of newt native to continental Europe and introduced to Great Britain and New Zealand. Adults measure 7–12 cm (2.8–4.7 in) and are usually dark grey to blue on the back and sides, with an orange belly and throat. Males are more conspicuously coloured than the drab females, especially during breeding season. (Full article...)
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Heavy metals are metallic elements with relatively high densities, atomic weights, or atomic numbers. The criteria used, and whether metalloids are included, vary depending on the author and context. In metallurgy, for example, a heavy metal may be defined on the basis of density, whereas in physics the distinguishing criterion might be atomic number, while a chemist would likely be more concerned with chemical behaviour. More specific definitions have been published, none of which have been widely accepted. The definitions surveyed in this article encompass up to 96 out of the 118 known chemical elements; only mercury, lead and bismuth meet all of them. Despite this lack of agreement, the term (plural or singular) is widely used in science. A density of more than 5 g/cm3 is sometimes quoted as a commonly used criterion and is used in the body of this article. (Full article...)
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In physics, energy (from Ancient Greek ἐνέργεια (enérgeia) 'activity') is the quantitative property that is transferred to a body or to a physical system, recognizable in the performance of work and in the form of heat and light. Energy is a conserved quantity—the law of conservation of energy states that energy can be converted in form, but not created or destroyed; matter and energy may also be converted to one another. The unit of measurement for energy in the International System of Units (SI) is the joule (J). (Full article...)
Did you know...
- ... that Mary Clutter used her directorial position at the National Science Foundation to require scientific conferences to include women speakers when presenting research done by them?
- ... that The Lord of the Ice Garden, a Polish novel series mixing elements of fantasy and science fiction, has been compared to The Witcher?
- ... that Margareth Rago seeks to establish a methodology for what she calls "feminist science"?
- ... that Cambodia's first science-fiction film, Karmalink, combines Buddhist concepts of karma with themes of artificial intelligence?
- ... that The Greenwood Encyclopedia of Science Fiction and Fantasy contains an idiosyncratic selection of topics, from "Aliens in Space" to "Rats and Mice"?
- ... that Brazilian computer science researcher and internet pioneer Tadao Takahashi negotiated with drug lords to install internet equipment in his country?
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Science News
- 10 July 2024 –
- Researchers from Northwestern University Feinberg School of Medicine and Harvard Medical School publish a claim for the cause and curative path for the autoimmune disease systemic lupus erythematosus in the journal Nature. (Newsmax) (Nature)
- 3 July 2024 –
- Scientists announce the discovery of the world's oldest cave painting, depicting three people gathered around a large red pig, estimated to be at least 51,200 years old, in Leang Karampurang cave in the Maros-Pangkep region, South Sulawesi, Indonesia. (Al Jazeera)
- 20 June 2024 – 2024 in archosaur paleontology
- Researchers announce the discovery the Lokiceratops rangiformis, a dinosaur species named after the Norse god Loki, in North America. The findings are published in the journal PeerJ. (ABC News)
- 20 June 2024 –
- The International Union for Conservation of Nature announces that the Iberian lynx has been upgraded from endangered to vulnerable for the first time since 1986, after a 2023 census showed a population of 2,021 animals. (BBC News)
- 5 June 2024 –
- Russian cosmonaut Oleg Kononenko becomes the first human to spend 1,000 days in outer space. (AP)
- 17 May 2024 –
- Scientists using the James Webb Space Telescope discover the earliest known merging of black holes, 740 million years after the Big Bang. (AP)