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- Sally Ride (1826 bytes)
1: ...ed her: [[Valentina Tereshkova]] ([[1963]]) and [[Svetlana Savitskaya]] ([[1982]]), both from the form...
5: ...rch in [[astrophysics]], [[general relativity]], and [[free-electron laser physics]]. She later became...
7: ...d University]] Center for International Security and Arms Control. Currently she is a professor of ph...
9: ...dents, the [[STS-51-L|''Challenger'' explosion]] and the [[Space Shuttle Columbia disaster]].
19: ...asa.gov/docs/StarChild/whos_who_level2/ride.html And an address if you want to write to her.] - Engraving (3556 bytes)
3: [[Image:gravers.jpg|thumb|An assortment of hand engraving tools]]
5: ... Other tools such as mezzotint rockers, roulets and burnishers are used for texturing effects.
9: ==History and usage==
11: ... sometimes a combination of [[lost-wax casting]] and chasing.
13: ... Engravings continued to be common in newspapers and many books into the early [[20th century]], as th... - Glass (26176 bytes)
1: ...xample is when [[Sucrose|table sugar]] is melted and cooled rapidly by dumping the liquid sugar onto a...
3: ...omes from [[Latin]] ''glacies'' (ice) and corresponds to [[German language|German]] ''Glas,'' [[Middle...
5: The remainder of this article will be concerned with a specif...
9: ...hanged entirely, with the addition of other compounds or [[heat treatment]].
13: ...n [[quartz]], or in its polycrystalline form, [[sand]]. - Printing (4400 bytes)
4: ...al]] process for reproducing copies of [[text]]s and [[image]]s, typically with [[ink]] on [[paper]] u...
6: ...and [[catalogue]]s). The largest commercial and industrial printer in the world is [[Montr顬]], [[Qu...
11: ...bic and Chinese libraries contained tens of thousands of printed books.
13: ...erg developed the use of raised and movable type and from the start used oil based inks.
15: ...s in North America at Massachusetts Bay in 1628, and helped establish the Cambridge Press. - Timeline of invention (28171 bytes)
3: ...tions are often invented by several inventors around the same time, or may be invented in an impractic...
8: ... 1 MYA: Controlled [[fire]] in [[Cradle of Humankind|Africa]]
11: * 50 KYA: [[Bow (weapon)|Bow]] and [[arrow]] in [[Tunisia]]
18: * 8700 BC: [[Metalworking]] ([[copper]] pendant in [[Iraq]])
22: * [[Animal husbandry]] in the [[Middle East]] - List of sports (7304 bytes)
1: ...gories are based on how the [[sport]] is played, and there are many more sports to be added. This syst...
4: Track and field [[athletics]].
16: ** [[Steeplechase#Steeplechase in Track and Field|Steeplechase]]
55: * [[Kendo]]
63: * [[Taekwondo]] - Tree (23723 bytes)
3: ...ived. A few species of trees grow to 100 m tall, and some can live for several [[millennium|millennia]...
5: ...ape and significant elements in [[landscaping]], and in [[agriculture]] supplying [[orchard]] crops (e...
9: ...us show a wide variety of growth form, leaf type and shape, bark characteristics, reproductive structu...
11: ...ng below gives examples of many well known trees and how they are typically classified.
13: ...dscape of trees scattered or spaced across grassland (usually grazed or burned over periodically) is c... - List of inventors (14020 bytes)
18: *[[Charles Babbage]], (1791-1871), [[England]] — [[Analytical engine]]
20: *[[Leo Baekeland]] (1863) - (1944), [[Belgian]]–American — [[plastic]]
22: *[[Steve Baer]] - (1938-) U.S. solar inventor and developer; architectural designer.
23: *[[John Logie Baird]], (1888-1946), [[Scotland]] — [[television]]
28: *[[Emile Berliner]], (1851-1929) [[Germany]] and [[United States|USA]] — [[gramophone]] - Microscope (8708 bytes)
1: ...ing such an instrument is called [[microscopy]], and the term '''microscopic''' means minute or very s...
3: The most common type of microscope—and the first to be invented—is the '''optical ...
8: ... in the [[magnifying glass]], the [[hand-lens]], and the [[loupe]].
10: ==Compound optical microscope==
11: ...rations]], particularly [[chromatic aberration]] and [[spherical aberration]]. In modern microscopes t... - Apple Macintosh (24250 bytes)
4: ...ers used [[operating system]]s (OS) with a [[command line interface]].
7: ...ed "Leopard", is scheduled to be released at the end of 2006.
9: ...number of innovations adopted later by other PCs and operating systems.
12: ...or is sometimes called the WIMP model for '''W'''indows, '''I'''cons, '''M'''enus, '''P'''ointer.
14: * The "double click" and "click-and-drag" behaviors to perform actions with a pointin... - Pinhole camera (6994 bytes)
1: ...rated flap of some light-proof material to cover and uncover the pinhole.
2: ...ture; typical exposure times can range from 5 seconds to more than an hour.
10: ...es), and in an extremely thin piece of material. Industrially produced pinholes have access to [[Laser...
12: ...n either side & rotating the pin as it glides in and out in order to produce a smooth circular hole.
19: ...length (distance from hole to photographic film) and <math>\lambda</math> is the wavelength of light. - March 22 (9294 bytes)
1: ... day of the year in the [[Gregorian Calendar]] (82nd in [[Leap year]]s). There are 284 days remaining...
3: {{MarchCalendar}}
5: * [[238]] - [[Gordian I]] and his son [[Gordian II]] are proclaimed [[Roman emp...
7: ...Indians kill 347 [[England|English]] settlers around [[Jamestown, Virginia]], a third of the colony's ...
8: ...ony]] outlaws the possession of cards, [[dice]], and gaming tables. - Atlanta, Georgia (39442 bytes)
16: |timezone=[[Eastern Standard Time Zone|Eastern]]: [[UTC]]-5
21: [[Image:Buckhead2.jpg|thumb|200px|The Expanding Atlanta Skyline]]
22: ...or college students who study Urban Geography around the globe.
24: ...enter for the [[American Civil Rights Movement]] and served as the host city for the Centennial [[1996...
26: ...n many of Atlanta's symbols, including its seal and flag. During much of the 20th century, Atlanta bi... - Computer mouse (29399 bytes)
1: ... ball.<br>'''2:''' X and Y rollers grip the ball and transfer movement.<br>'''3:''' Optical encoding d...
2: ...:''' Sensors gather light pulses to convert to X and Y velocities.]]
3: ...and shaped to sit naturally under the hand. The underside of the mouse houses a device that detects t...
5: ...ord on early models resembled the rodent's tail, and also because the motion of the pointer on the scr...
9: [[Image:firstmouseunderside.jpg|frame|The first computer mouse held by ... - Cornea (4779 bytes)
1: ...lens]], the cornea [[refraction|refracts]] light and consequently helps the eye to [[focus (optics)|fo...
3: ...]] and a thickness of 0.5 - 0.7 mm in the center and 1.0 - 1.2 mm at the periphery.
11: ... [[epithelium|epithelial]] layer of fast-growing and easily regenerated [[biological cell|cells]]. [[T...
17: ...as the modified basement membrane of the corneal endothelium.
19: ...ction and appearance from [[endothelium|vascular endothelia]].) - Arsenic (12497 bytes)
7: ...n="center" | [[germanium]] – '''arsenic''' – [[selenium]]
12: <div align="right"><small>[[Periodic table (standard)|Full table]]</small></div>
69: | [[Speed of sound]] || __ [[metre per second|m/s]] at __ K
78: | [[Electrical conductivity]] || 3.45 10<sup>6</sup>/(m?[[ohm]])
80: | [[Thermal conductivity]] - Dysprosium (8843 bytes)
5: ...="center" | [[Terbium]] – '''Dysprosium''' – [[Holmium]]
10: <div align="right"><small>[[Periodic table (standard)|Full table]]</small></div>
59: | solid ([[ferromagnetic]]<BR>under liquid nitrogen,<BR>nonmagnetic at<BR>room temp...
79: | [[Velocity of sound]]
80: | 2170 [[metre per second|m/s]] at 293.15 K - Europium (8579 bytes)
5: ...n="center" | [[Samarium]] – '''Europium''' – [[Gadolinium]]
10: <div align="right"><small>[[Periodic table (standard)|Full table]]</small></div>
79: | [[Velocity of sound]]
90: | [[Electrical conductivity]]
93: | [[Thermal conductivity]] - Gallium (9500 bytes)
7: ... align="center" | [[zinc]] – '''gallium''' – [[germanium]]
9: ...ign="center" | [[Aluminium|Al]]<br>'''Ga'''<br>[[Indium|In]] <br> <br>
12: <div align="right"><small>[[Periodic table (standard)|Full table]]</small></div>
83: | [[Speed of sound]]
84: | 2740 [[metre per second|m/s]] at 20 ?C - Hafnium (9162 bytes)
9: ...br><div align="right"><small>[[Periodic table (standard)|Full table]]</small></div>
78: | [[Speed of sound]]
79: | 3010 [[metre per second|m/s]] at 293.15 K
89: | [[Electrical conductivity]]
92: | [[Thermal conductivity]]
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