| Important_20th_Century_Discoveries_in_Physics Eight major discoveries made in physics plus a summary of the centennial celebration of the American Physical Society. |
| In_Our_Time__James_Clerk_Maxwell BBC Radio 4 discussion on the life and work of this 19th century physicist. |
| Infography_about_History_of_Physics Sources recommended by a professor who specializes in the study of the history of physics. |
| International_Catalog_of_Sources_for_History_of_Physics_and_Allied_______Sciences Search records for unpublished source materials in the Niels Bohr Library archives and over 500 other repositories worldwide. |
| The_Invention_of_Knowledge The connections between the sciences and the arts with emphasis on physics. A prediction on where to look for the next great theories in physics. |
| Jim\'s_Science_Page Science quotes, facts and falacies... mystery scientists in history link. |
| Museum_of_Physics_Department Early instruments of the Institute of Physics of Naples |
| The_Net_Advance_of_Physics__History Review Articles and Tutorials in an Encyclopaedic Format at The Net Advance of Physics, MIT |
| The_Nuclear_Files Most comprehensive and user friendly online tool to explore the political and ethical dilemmas of the Nuclear Age. A citizen guide to create a saner and more peaceful world. Classroom use encouraged. |
| Physics_Cabinet A virtual museum of physics apparatus and instruments of the nineteenth and twentieth centuries. |
| Physics_in_Australia_to_1945 The listing is intended to be a complete register of all Australian publications in physics up to the end of 1945 |
| The_Physics_Museum_at_The_University_of_Queensland Instruments, books, and memorabilia dating to the very early days of modern physics. |
| Physics_org_-_Physics_Evolution Interactive exhibit introducing physics characters, their stories and how they influenced each other. Text-only version also available. |
| The_Quantum_Age_Begins An overview of the development of quantum mechanics. |
| Selected_Papers Selected Papers of Great American Physicists on the web. |
| Sketches_of_a_History_of_Statistical_Mechanics_and_Thermodynamics Timeline of the major events of statistical mechanics and thermodynamics. Includes links to biographies and a complete bibliography. Part of the HyperJeff Network. |
| Theater_of_Electricity Explore the history of static electricity and the machines which have used it to make big sparks and create strong electric fields. Van de Graaff generators and Tesla coils are two examples of what i |
| Timeline_of_Nobel_Winners_-_Physics List of Nobel Laureates in Physics from 1901 to the present day. |
| Transistorized Describes the history of most important invention of the 20th century: the transistor. |
| Vacuum_Terminology_and_Technology Vacuum history; biographies of famous physicists, and mathematicians. |
| About_com_-_Arizona_Monsoon_Thunderstorms Get details and safety tips about Arizona's monsoon season, which begins in July and lasts several weeks. |
| Bew_-_Incredible_Weather Image galleries of weather phenomena in Canada as well as tools for chasing tornadoes on the internet. Site in both English and French. |
| Greg\'s_Weather_Center Large collection of links to sites about weather (hurricanes, blizzards, and tornadoes) and a section with storm updates. |
| Lenticular_Cloud_Photo Lenticular Cloud Photo by Doug Sudduth, taken from near Bakersville,NC on 12/26/99 in the lea of the Black Mountain range. |
| Monsoons_and_the_Tropospheric_Biennial_Oscillation Brief review of the monsoon basics and the tropospheric biennial oscillation. |
| National_Geographic_-_Forces_of_Nature Learn more about earthquakes, volcanoes, tornadoes, and hurricanes through maps, photos, and 3D animations. |
| National_Severe_Storms_Laboratory The National Severe Storms Laboratory is one of NOAA's internationally known Environmental Research Laboratories, leading the way in investigations of all aspects of severe weather. Headquartered in N |
| SkyScapes_-_images_of_clouds Collection of photographs of cloud formations, organized according to standard cloud classifications. |
| Sydney,_Australia_Hailstorms,_Tornados,_And_Weather_Photographs Pictures and descriptions of Australian hailstorms, tornados, and weather. |
| Tim\'s_Cloud_Chart Cloud chart that contains all of the major cloud groups, along with pictures and detailed descriptions of each. |
| Top_Weather,_Water,_and_Climate_Events_of_the_Twentieth_Century_(Story_334) Background information on the top weather events around the world. Compiled by NOAA. |
| Weather_Central_By_Mark The site includes many pictures, facts, links, and other information. |
| WeatherQuestions_com Concise and interesting answers to the most-often asked questions about the weather, arranged in alphabetical order. |
| Weird_Weather_Reports Records anecdotal stories about hurricanes, fires, extreme temperatures, tornadoes, flooding, droughts and other weather related phenomena. |
| The_Age_of_the_Earth_and_the_Universe Reviews and discusses the evidences for whether the earth and the universe are young or old, focusing on the options and issues for harmonizing science and creation theory. |
| The_Biotic_Message Annotated outline, reviews, and other promotional material this book by Walter ReMine, which propounds a new creationist theory (Message Theory) to replace evolution. |
| Creationism/Evolution Skeptic Friends Network, by Dawn and Tommy Huxley. Examines some of the claims made by evolutionists. |
| Darwin_Doesn\'t_Work_Here_Any_More__Shattering_the_Myths_of_Darwinism Review and excerpts from a book in which Richard Milton, who spent some twenty years studying the geology and palaeontology of the British Isles, criticises the "evidence" for Darwinism as either cir |
| Do_You_Believe_that_Evolution_is_True? Discusses questions that will have to be answered before evolution theory can be accepted as fact. |
| Evolution_and_the_Ice_Canopy Presents the idea that evolution should be taught as theory not fact, and reasons for this. Index page has many glitches. |
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![[NIST Virtual Museum]](http://physics.nist.gov//Images/But/museumhome_texture.gif){kind=small}
![[Assembly of Low Temperature Equipment]](http://physics.nist.gov/GenInt/Parity/cover.html/pics/figure3a.jpg)
Between Christmas of 1956 and New Year's Day, the first exciting results emerged from a difficult but fundamental scientific experiment at the National Bureau of Standards (NBS) in Washington, DC [currently the National Institute of Standards and Technology (NIST)]. The experiment showed, strikingly and convincingly, that in at least one fundamental physical process, our world is distinguishable from its mirror image. Physicists had long assumed the opposite. They constructed their theories so as to ensure that the corresponding mathematical property, called parity, remains unaltered - is conserved - in all subatomic processes. Thus this experiment brought about the fall of parity from its exalted position alongside such well conserved physical quantities as energy, momentum, and electric charge.Contents:Parity: What's Not Conserved?Descriptive Explanation of the ExperimentPhoto Gallery with Short Biographies Experimentalists: Chien-Shiung Wu Ernest Ambler Raymond W. Hayward Dale D. Hoppes Ralph P. Hudson Theorists: Tsung Dao Lee Chen Ning Yang Exhibit designed by W. C. Martin, J. Coursey, and R. A. DragosetThis exhibit was prepared by the NIST Physics Laboratory as a project of the NIST Museum Committee. It is one of the exhibit panels in the NIST Virtual Museum.Much of the experimental apparatus for the experiment described here was reassembled with the help of Raymond Hayward and Bruce Dove for an exhibit entitled ``The Fall of Parity'' shown at the National Museum of American History (NMAH) in Washington, DC, during 1982 to mark the 25th anniversary of the experiment. That exhibit with the apparatus is now in the NIST Museum in Gaithersburg, MD on long-term loan from NMAH.The title, introductory paragraph, ``Parity: What's Not Conserved?'' and certain other material in the exhibit presented here are taken from, or based on, the NMAH exhibit by Paul Forman, curator for modern physics at NMAH, Smithsonian Institution.The ``Descriptive Explanation of the Experiment'' is largely taken from an account published in the NBS Technical News Bulletin, Vol. 41, No. 4 (April 1957). Raymond Hayward, Ralph Hudson, and Michael Danos gave advice and were helpful in other ways in the preparation of this exhibit. Michelle Hane provided assistance in producing some of the documents in HTML code.Online: July 1997
