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- Steel (28384 bytes)
28: ...into tools in pre-contact [[North America]]. Beginning around the year [[1000]], the [[Thule]] people...
32: ...Swedish Iron Age, found at Gotland, Sweden.]] Beginning between [[3000 BC]] to [[2000 BC]] increasing ...
36: ...nt theory is that warfare and mass migrations beginning around 1200 BC disrupted the regional tin trad...
40: ...l fire for prolonged periods of time. By the beginning of the iron age, smiths had discovered that ir...
60: ...increasing the height of the flue to as tall as 5 meters (16 feet) and smelting as much as 350 kg (750 lb... - Turkmenistan (10788 bytes)
28: ...area|Ranked 51st]]<br/> 488,100 [[square kilometer|km²]]<br/> Negligible
60: Separated from [[Persia]] and annexed by [[Russia]] between [[1865]] and [[1885]], ...
66: ... a very short person, barely taller than 150 centimeters (5 feet).
82: | [[Image:TurkmenistanNumbered.png|150px|left|]]
88: ...e]], along the southwestern border, reaches 2,912 meters. The Balkan Mountains in the far west and the Ku... - Mummy (16225 bytes)
67: ...he [[Eastern Han Dynasty]] (25-220 AD), was 1.8 [[meter]]s (nearly six feet) tall and might have died at ...
69: ...'s [[Silk Road]] in [[Xinjiang]], about 200 [[kilometers]] east of Yingpan.
104: * [[Nesperennub]] - St. Peter's Basilica (17805 bytes)
4: ...distinction belongs to the [[Basilica di San Giovanni in Laterano]]. However, due to the proximity of...
8: ...in this exact spot, which had previously been a cemetery for pagans as well as Christians.
17: ...]] and [[1667]], in the center of which is a 25.5 meter tall obelisk. The [[obelisk]] was moved to its pr...
22: ...) across. It is not simply its vast scale (136.57 meters from from the floor of the church to the top of ...
24: ... by Donato Bramante at the outset in 1503, was planned to be carried out with a single masonry shell, ... - Trajans Column (10003 bytes)
3: ...s, with a diameter of 3.7 meters (11 ft). The 190 meter (625 ft) frieze winds around the shaft 23 times. ...
19: ...ient Roman units of measurement|Roman feet]]; beginning slightly above the bottom of the base, the hel...
61: ...across the bands of images— just as, on the Colonne Vendôme, Napoleon's figure can be picked up, sc... - List of inventors (14020 bytes)
12: *[[Manfred von Ardenne]], (1907-1997), [[Germany]]
26: *[[Arnold O. Beckman]], (1900 - 2004), [[pH]] meter
36: ...;]], (1711-1787) — [[Croatia]], ring-[[micrometer]], water [[telescope]]
41: ...England — [[lawnmower]] and [[adjustable spanner]]
66: *[[W.K. Dickson|William Kennedy Laurie Dickson]], motion picture camera - Pioneer 11 (5118 bytes)
5: ...ium-gain antenna. A low-gain, omnidirectional antenna is mounted below the high-gain dish. The spacecr...
7: ...nfrared radiometer]], and an [[imaging photopolarimeter]], which produced [[photograph]]s and measured th...
24: * [[Unmanned space missions]] - Venus (planet) (31010 bytes)
16: ...ght from ever heating the surface. Venus's [[Bolometer|bolometric]] [[albedo]] is approximately 60%, and...
23: ... It is not known why Venus is different in this manner, although it may be the result of a collision w...
25: ... no impact crater smaller than about 3.2 km in diameter can form.
31: ... veil no mortal raised), first observed by [[Giovanni Domenico Cassini]] in [[1672]]. Sporadic sightin...
36: ...enus (which the early Babylonians called ''Nindaranna''). The ancient [[Sumeria]]ns and Babylonians ca... - Sundial (16148 bytes)
89: ...to measure angles to geographic features. Large (meter-sized) diptychs may have been used for [[navigati...
99: == Precision sundials (heliochronometers) ==
101: A precision sundial, called a '''heliochronometer''',
105: Heliochronometers usually indicate the minutes to within 1 minute ...
109: The classic shape for a heliochronometer is an ''equatorial bow sundial''. - Mammal (11782 bytes)
57: *[[Fennec Fox]]
164: ...vidence of mammalian evolution from reptilian beginnings: from a single ear bone, and several lower ja...
181: ...s]] around 130 million years old, one more than a meter in length, the other having remains of a baby din...
204: ...te and progress concerning the theoretical underpinnings of systematization itself, partly through the... - Lightning (33113 bytes)
6: ... The electricity passing through the discharge channels rapidly heats and expands the air, producing l...
24: ...forced to flow in opposite directions (stepped channels called [[Step leader|step leaders]]). The con...
26: ...led a [[positive streamer]], and can eventually connect to the descending discharge from the cloud.
33: ...en the discharge rapidly superheats the leader channel, causing a [[shock wave]] to be sent out.
35: ...path. Photographs have been taken on which non-connected streamers are visible [http://www.erh.noaa.g... - Atmospheric pressure (6841 bytes)
18: ...ts on radio, television, and newspapers. When barometers in the home are set to match the local weather r...
22: ...making this reduction differs slightly. See [[altimeter]].
24: ...metric altimeter setting which will cause the altimeter to read altitude above mean sea level in the vici...
26: ...ometric altimeter setting which will cause an altimeter to read height above a particular runway threshol...
41: ...c pressure is often measured with a mercury [[barometer]], and a height of approximately 30 inches of mer... - Cambodia (32076 bytes)
79: ...ellectuals, detractors of Marxism, and some just innocent civilians. Millions fled across to neighbour...
85: ...n present day Cambodia appeared in the [[1st millennium]] AD. During the 300s, 400s, and 500s AD, the ...
122: ...ustion, the regime killed anyone suspected with connections with either the defeated Khmer Republic go...
169: ...etnam]] on the east and southeast. It has 443 kilometers of coastline along the [[Gulf of Thailand]].
171: ... the [[Dangrek Mountains]] (average elevation 500 meters) along the border with Thailand's [[Isan]] regio... - Bottlenose Dolphin (16802 bytes)
23: ... the tail) and dorsal fin are formed of dense [[connective tissue]] and don't contain bones or muscle....
40: ...y will employ "fish wacking" whereby a fish is stunned (and sometimes thrown out of the water) with th...
43: ...yes, but most sound waves are transmitted to the inner ear through the lower jaw. As the object of int...
59: ...hich may be male). A single calf is born, about 1 meter (3 feet) long at birth. - Tsunami (29462 bytes)
2: ...sunami. The effects of a tsunami can range from unnoticeable to devastation.
4: ...lometres long), which is why they generally pass unnoticed at sea, forming only a passing "hump" in th...
24: ...nce as the wave travels, so the energy per linear meter in the wave decreases as the inverse power of the...
28: ...n less than one metre. This is often practically unnoticeable to people on ships. The energy of a tsun...
45: Tsunamis cannot be prevented or precisely predicted, but there ... - Long-distance track event (2855 bytes)
1: ...trained consistently for over 10 weeks prior to running the race.
5: ===3,000 meter steeplechase===
7: ...rength, stamina and agility than the flat [[3,000 meter]] event. The world record for men is:
15: ===5,000 meters===
17: ...ch an event may comprise of a total of 60-200 kilometers a week. The world record for men: - Forbidden City (7592 bytes)
3:
14: ...specifically designed to withstand attacks by [[cannon]]s.
16: ...;和門). The northern section, or the Inner Court, was where the Emperor worked and lived w... - Palermo (10618 bytes)
12: ... seen in the Palatine Chapel, the church San Giovanni degli Eremiti and the Zisa. [http://sights.seind...
18: The Italian ''[[Risorgimento]]'' and Sicily's annexation ([[1860]]) to the [[House of Savoy|kingdom...
30: ...problems, but is also a city of almost three millennia of history, beautiful palaces and churches, col...
42: ...ian (astronomy)|la Meridiana]] '' on the floor, running precisely N/S. The ends of the line mark the ...
47: ...degrees of preservation. Close to the city is 600 meter high Monte Pellegrino, with spectacular views of ... - Hubble Space Telescope (50930 bytes)
26: |'''Diameter'''||2.4 m
34: |'''[[NICMOS]]'''||camera/spectrometer
40: |'''[[STIS]]'''||spectrometer/camera (failed)
45: ...ion in 1993, the telescope was restored to its planned quality, and became a vital research tool as we...
54: ...or a telescope with a [[mirror]] 2.5 m in diameter. The second major advantage would be that a spac... - Alfalfa (6719 bytes)
18: ...Fabaceae]], the [[pea]] family) is a genus of perennial flowering [[plant]], ''Medicago'', most common...
20: ... deep [[root]] system sometimes stretching to 4.5 meters. This makes it very resilient, especially to dro...
24: Its wide cultivation beginning in the seventeenth century was an important ad...
39: ...es a year. Total yields are typically around 1 tonne/hectare (4 ton/acre) but vary regionally and wit...
47: ... Ideally, the hay is cut just as the field is beginning to flower. When using farm equipment rather th...
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