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Scientists maintain that scientific investigation must adhere to the scientific method, a process for properly developing and evaluating natural explanations for observable phenomena based on empirical study and independent verification. Science therefore, rejects supernatural explanations and arguments from authority.
Fields of science are commonly classified along two major lines: Natural sciences, which study natural phenomena; and Social sciences, which study human behavior and societies. Whether mathematics is a science is a matter of perspective.
Fields of science can be further distinguished as pure science or applied science. Pure science is principally involved with the discovery of new truths with less (or no) regard to their applications. Applied science is principally involved with the application of existing knowledge in new ways.More about Science... Show new selections edit watch
Selected articleA space elevator is a hypothetical structure designed to transport material from a planet's surface into space. Many different types of space elevator structures have been proposed. They all share the goal of replacing rocket propulsion with the traversal of a fixed structure via a mechanism not unlike an elevator, hence its name, in order to move material into or beyond orbit. Space elevators have also sometimes been referred to as space bridges, beanstalks, space ladders or space lifts. The most common proposal is a tether (usually a cable or ribbon) that spans from the surface to a point beyond geosynchronous orbit. As the planet rotates, the inertia at the end of the tether counteracts gravity and keeps the tether taut. Vehicles can then climb the tether and escape the planet's gravity without the use of rockets. Such a structure could eventually permit delivery of great quantities of cargo and people to orbit, and at costs only a fraction of those associated with current means. ...Archive/Nominations edit watch
Selected pictureCredit: Dake
Sonoluminescence is the emission of short bursts of light from imploding bubbles in a liquid when excited by sound. The effect was first discovered at the University of Cologne in 1934 as a result of work on sonar. H. Frenzel and H. Schultes put an ultrasound transducer in a tank of photographic developer fluid. They hoped to speed up the development process. Instead, they noticed tiny dots on the film after developing, and realized that the bubbles in the fluid were emitting light with the ultrasound turned on. It was too difficult to analyze the effect in early experiments because of the complex environment of a large number of short-lived bubbles. (This experiment is also ascribed to N. Marinesco and J.J. Trillat in 1933).
Sonoluminescence may or may not occur whenever a sound wave of sufficient intensity induces a gaseous cavity within a liquid to quickly collapse. This cavity may take the form of a pre-existing bubble, or may be generated through a process known as cavitation. Sonoluminescence in the laboratory can be made to be stable, so that a single bubble will expand and collapse over and over again in a periodic fashion, emitting a burst of light each time it collapses....Archive/Nominations edit watch
Selected biographyJohann Georg Adam Forster (November 27, 1754 – January 10, 1794) was a German naturalist, ethnologist, travel writer, journalist, and revolutionary. At an early age, he accompanied his father on several scientific expeditions, including James Cook's second voyage to the Pacific. His report from that journey, A Voyage Round the World, contributed significantly to the ethnology of the people of Polynesia. As a result of the report Forster was admitted to the Royal Society at the early age of twenty-two and came to be considered one of the founders of modern scientific travel literature.
After his return to continental Europe, Forster turned towards academics. From 1778 to 1784 he taught natural history. Most of his scientific work consisted of essays on botany and ethnology, but he also prefaced and translated many books about travels and explorations, including a German translation of Cook's diaries. Forster was a central figure of the Enlightenment in Germany....Archive/Nominations edit watch
Did you know...
- ...that a laser harp (pictured) is an electronic musical instrument consisting of several laser beams that are blocked to produce sound?
- ...that Terminonatator ponteixensis is the type and only species described for Terminonatator, a genus of elasmosaurid plesiosaur from Late Cretaceous of Saskatchewan, Canada?
- ...necrotizing fasciitis is a rare infection of subcutaneous tissues that results in the necrosis of the flesh?
- ...Napalm-B, used in the Vietnam War, was synthesized with only three ingredients: polystyrene, gasoline, and benzene?
- ...Active noise canceling headphones, use circuitry to produce destructive wave interference to attenuate background sound? ...Archive/Nominations
Science NewsScience news on Wikipedia
- February 13: Researchers at Yale School of Medicine develop a blood test which detects early stage ovarian cancer with 99 percent accuracy. (ScienceDaily)
- February 13: A transitional fossil in bat evolution may help resolve a longstanding debate, whether echolocation or flight came first. The 52 million year old fossil has wing development while the ear lacks echolocation structures. (ScienceDaily)
- February 11: Researchers at the University of Delaware find a promising way to repair the gene defect that causes spinal muscular atrophy. (UDel)
- February 11: A rat study found that rats given artificial sweetener gained more weight than those on a sugar diet. Scientists speculate the body increases the metabolism anticipating calories that never come, then requires more food to make up the shortfall. (SciAm)
- February 8: The first commercial vessel to use a kite to help save fuel created by SkySails finished its maiden voyage. Estimates are that the ship saved 10-15% fuel while the kite was in use, which translates into $1,000 to $1,500 in fuel costs per day.(Nature)
- February 8: San Diego scientists have successfully used stem cells to treat Type I diabetes in mice. (NewScientist)
- February 7: A new knee device is demonstrated that can generate electricity efficiently from walking with minimal effort. The system acquires energy from deceleration similar to how hybrid-electric cars regain energy from regenerative braking. (CBC)
- February 7: New studies in the journal Science conclude Biofuels are not beneficial to climate change, as they require increased land use to grow crops and unintentionally increases the cost of food. (SciAm)
- June 12: Romanian fighter jet hit by UFOs
- June 12: Kai-fu Lee: Developers will rule the next-generation Internet world
- June 12: 2008 DRAMeXchange Compuforum: Global DRAM market to be changed majorly
- June 12: Scientists suggest scaring toads to limit population
- June 12: 2008 Google Developer Day starts from Yokohama, Japan
- June 11: NASA's Phoenix Lander has an oven full of Martian soil
- June 10: US energy department reveals world's fastest computer
- June 10: Apple launches 3G iPhone
- June 9: 2008 COMPUTEX Taipei: Another insight of "Design"
- June 9: 2008 e21FORUM: Intel confronts Microsoft again
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