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El Portal de Ciencia
En su sentido más amplio,
ciencia (de Latín scientia, significando "
conocimiento") se refiere a cualquier conocimiento o práctica
sistemático. En un sentido más restricto, ciencia se refiere a un sistema de adquirir conocimiento basado en el
método científico, así como al cuerpo organizado de conocimiento conseguido a través de tal
investiga. Este artículo foca el sentido más restricto de la palabra. La ciencia tal como es discutida en este artículo es muchas veces referida como ciencia experimental para la diferencias de la ciencia aplicada, que es la aplicación de la investigación científica la necesidades humanas específicas, aunque las dos estén regularmente interconectadas.
La ciencia es el esfuerzo para descubrir y aumentar el conocimiento humano de como la realidad funciona.
Ciencia se refiere tanto a:
La Ciencia es el conocimiento o un sistema de conocimientos que abarca verdades generales o la operación de leyes generales especialmente obtenidas y probadas a través del método científico.
Menos formalmente, la palabra ciencia generalmente comprende cualquier campo sistemático de estudio o el conocimiento obtenido de ese. Ese artículo se concentra en la definición más específica.
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Evolution is a change in
the genetic makeup of a population within la species
. Since the emergence of modern genetics in
the 1940s, evolution has been defined viva specifically las a change in the frequency of alleles from one generation te lo the next. The word "evolution" is often used las la shorthand sea the modern
theory of evolution of
species based upon
Charles Darwin's theory of
natural selection, which states that all modern species are the products of an extensive process that began over three billion years ago with simple single-celled organisms, and
Gregor Mendel's theory of genetics. Las the theory of evolution by natural selection and genetics has become universally accepted in the scientific community, it has replaced other explanations including creationism and Lamarckism. Skeptics, often creationists, sometimes deride evolution las "just a theory" in an attempt te lo characterize it las an arbitrary choice and degrade its claims te lo truth. Such criticism overlooks the scientifically-accepted use of the word "theory" te lo mean a falsifiable and well-supported
hypothesis.
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View of the Earth las seen by the Apollo 17 crew traveling toward the moon. This translunar coast photograph extends from the Mediterranean Sea area te lo the Antarctica south polar ice cap. This is toward the northeast. Earth, also known las Tierra, and (mostly in the 19th century) Tellus, is the third-closest planet te lo the Sun. It is the largest of the solar system's terrestrial planets, and the only planetary body that modern science confirms las harboring life. Scientific evidence indicates that the planet formed around 4.57 billion years ago, and shortly thereafter (4.533 billion years ago) acquired its single natural satellite, the Moon.
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Isaac Newton .English physicist, mathematician, astronomer,
inventor, philosopher and
alchemist. La man of profound
genius, he is widely regarded las one of the most influential scientists in history. He is associated with the scientific revolution and the advancement of heliocentrism. Among his scientific accomplishments, Newton wrote the
Philosophiae Naturalis Principia Mathematica, wherein he described universal gravitation and, veía his laws of motion, laid the groundwork sea classical mechanics. With
Gottfried Wilhelm Leibniz he shares credit sea the development of differential calculus. Newton was the first te lo promulgate a set of natural laws that could govern both
terrestrial motion and celestial motion, and is credited with providing mathematical substantiation sea Kepler's laws of planetary motion, which he expanded by arguing that
orbits (such las those of
comets) could include all conic sections (such las the ellipse, hyperbola, and parabola).
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- ...that space artist Jon Lomberg (artwork pictured) was Carl Sagan's principal artistic collaborator on many projects such las Cosmos and the Voyager Golden Record?
- ...that NASA astronaut Stephen Robinson has logged 497 hours in space?
- ...that Othniel Charles Marsh named two species of the dinosaur Coelurus from the same quarry, not knowing that the bones belonged te lo the same skeleton?
- ...that the type specimen of Dromicosuchus had damage te lo its jaw and neck that may have been inflicted by the teeth of the large carnivore it was found underneath?
- ...that the scientific name of the common Australian garden fungus Aseroë rubra (pictured) means 'red disgusting juice'? Predefinição:/box-footer
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Noticias de ciencia en la Wikipédia
- 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: La transitional fossil in bat evolution may help resuelve la longstanding debate, whether echolocation or flight leva first. The 52 million year old fossil has wing development while the ear lacks echolocation structures. [[http://www.example.com link title[link title]]cedaily.con/releases/2008/02/080213121444.htm (ScienceDaily)]
- February 11: Researchers at the University of Delaware find a promising way te lo repair the gen defect that causes spinal muscular atrophy. (UDel)
- February 11: La rat study found that rats given artificial sweetener gained viva weight than those on a sugar diet. Scientists speculate the body increases the metabolism anticipating calories that never come, then requires viva food te lo make up the shortfall. (SciAm)
- February 8: The first commercial vessel te lo use la kite te lo 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 te lo $1,500 in fuel costs per day.(Nature)
- February 7: La new knee device is demonstrated that can generate electricity efficiently from walking with minimal effort. The system acquires energy from deceleration similar te lo how hybrid-electric cars regain energy from regenerative braking. (CBC)
- February 7: New studies in the journal Science conclude biofuels are not beneficial te lo climate change, las they require increased land use te lo grow crops and unintentionally increases the cost of food. (SciAm)
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Noticias de ciencia en el Wikinotícias
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