ca de en es fr it nl no pl pt ru ro fi sv tr vo


 


Warning: curl_setopt() function.curl-setopt: CURLOPT_FOLLOWLOCATION cannot be activated when in safe_mode or an open_basedir is set in /home/trytox/domains/en.wikusia.com/public_html/science/wikipedia.php on line 254
Portal:Science - Wikipedia, the free encyclopedia

Portal:Science

From Wikipedia, the free encyclopedia
Jump to: navigation, search

Nuvola apps kalzium.svg Science: Astrolabe-Persian-18C.jpg History of science   P philosophy.png  Philosophy of science   Complex-adaptive-system.jpg Systems science   Nuvola apps edu mathematics-p.svg Mathematics   EscherichiaColi NIAID.jpg Biology   Nuvola apps edu science.svg Chemistry   Stylised Lithium Atom.svg Physics   Gnome-globe.svg Earth sciences   Nuvola apps display.png Technology  

Main page   Categories & Main topics   Portals & WikiProjects   Things you can do
The Science Portal

Icon

Science, in the broadest sense of the term, refers to any system of knowledge attained by verifiable means. In a more restricted sense, science refers to a system of acquiring knowledge based on empiricism, experimentation, and methodological naturalism, as well as to the organized body of knowledge humans have gained by such qualified research.

Scientists maintain that scientific investigation must adhere to the scientific method, a rigorous process for properly developing and evaluating natural explanations for observable phenomena based on reliable empirical evidence and neutral, unbiased independent verification, and not on arguments from authority or popular preferences. Science therefore bypasses supernatural explanations; it instead only considers natural explanations that may be falsifiable.

Fields of science are distinguished as pure science or applied science. Pure science is principally involved with the discovery of new truths with little or no regard to their practical applications. Applied science is principally involved with the application of existing knowledge in new ways, including advances in technology.

 watch  

Selected article

The Grand Canyon from Navajo Point
The geology of the Grand Canyon area exposes one of the most complete sequences of rock anywhere, representing a period of nearly 2 billion years of the Earth's history in that part of North America. The major sedimentary rock layers exposed in the Grand Canyon and in the Grand Canyon National Park area range in age from 200 million to nearly 2 billion years old. Most were deposited in warm, shallow seas and near ancient, long-gone sea shores. Both marine and terrestrial sediments are represented, including fossilized sand dunes from an extinct desert.

Uplift of the region started about 75 million years ago in the Laramide orogeny, a mountain-building event that is largely responsible for creating the Rocky Mountains to the east. Accelerated uplift started 17 million years ago when the Colorado Plateaus (on which the area is located) were being formed. In total these layers were uplifted an estimated 10,000 feet (3000 m) which enabled the ancestral Colorado River to cut its channel into the four plateaus that constitute this area. But the canyon did not start to form until 5.3 million years ago when the Gulf of California opened up and thus lowered the river's base level (its lowest point) from that of large inland lakes to sea level.

 watch  

Selected picture

View of the Earth as seen by the Apollo 17 crew traveling toward the moon.
Credit: Earth Sciences and Image Analysis Laboratory, NASA

View of the Earth as seen by the Apollo 17 crew traveling toward the moon. This translunar coast photograph extends from the Mediterranean Sea area to the Antarctica south polar ice cap. This is toward the northeast. Earth, also known as Terra, and (mostly in the 19th century) Tellus, is the third-closest planet to the Sun. It is the largest of the solar system's terrestrial planets, and the only planetary body that modern science confirms as 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

 watch  

Selected biography

Wolfgang Ernst Pauli (April 25, 1900–December 15, 1958) was an Austrian physicist noted for his work on the theory of spin, and in particular the discovery of the Exclusion principle, which underpins the whole of chemistry and quantum mechanics.

He seldom published papers, preferring lengthy correspondences with colleagues (such as Bohr and Heisenberg, with whom he had close friendships.) Many of his ideas and results were never published and appeared only in his letters, which were often copied and circulated by their recipients. Pauli was apparently unconcerned that much of his work thus went uncredited.

 watch  

Did you know...

 watch  

Science News

 watch  

Associated Wikimedia

Purge server cache

All Right Reserved © 2007, Designed by Stylish Blog.