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- Spider (29039 bytes)
85: ...upported by a hard [[exoskeleton]] composed of mainly of [[chitin]]. Spiders also have eight legs (ins...
90: ...Primitive [[mygalomorph]] spiders generally have only a pair of [[book lungs]] filled with haemolymph,...
98: ... is better developed than the rest, or there are only six pair, or no eyes at all. Several families of...
116: ...turation and enters his adult life with one palp only. The palpi constitute 20% of its body mass, and ...
123: ...ale spider towards the male is largely a myth... only in some exceptional cases does the male fall vic... - Influenza (10335 bytes)
1: ...uenza'''. For the digestive-system diseases commonly called "stomach '''flu'''" (and widely misunders...
3: '''Influenza''' (or as it is commonly known, '''the flu''' or '''the grippe''') is a c...
10: * Influenza B viruses that infect only humans
11: * Influenza C viruses that infect only humans
12: ...ore resistance to influenza B and C because they only undergo [[antigenic drift]] and have more simila... - Desert (21206 bytes)
20: ... remains frozen as snow pack; these are more commonly referred to as [[tundra]] if a short season of a...
28: ... dry winds dissipate cloud cover, allowing more sunlight to heat the land. Most of the major deserts o...
50: ...nd north of the [[Himalaya]], in parts of the [[Kunlun Mountains]] and the [[Tibetan Plateau]]. Many l...
53: ...tures in these deserts, but snow dunes occur commonly in areas where precipitation is locally more abu...
59: ...es. Although its surface atmospheric pressure is only about one-hundredth that of Earth, global circul... - Time zone (34024 bytes)
8: ...is, incidentally, local time at Greenwich itself only between 01:00 UTC on the last Sunday in October ...
31: ...ime until [[August 2]], [[1880]]. This paragraph only applies to the island of Great Britain, not to t...
41: ... 7.5? wide separated by a [[longitude]] of 180?. Unlike the zig-zagging land-based [[International Dat...
43: ...eas that do not have a legal standard time ([[Greenland]]'s [[ice sheet]] and all of [[Antarctica]]&md...
45: ...it to within 50 ms of UT1, reducing the error to only 20 m. - Anemometer (11426 bytes)
7: ...wn that the actual ratio, or factor as it is commonly called, of the velocity of the wind to that of t...
13: ...ed by the springiness of the connection, and not only is the plate itself driven too far back, but als... - Mercury (planet) (22924 bytes)
1: ...was [[Mariner 10]] ([[1974]]–[[1975|75]]); only 40–45% of the planet has been mapped.
9: ===Temperature and sunlight===
10: ...adiation]]; not [[climate]] or [[season]]). The sunlight on Mercury's surface is 6.5 times as intense ...
28: ...ls 42% of the planetary [[volume]] (Earth's core only fills 17%). Surrounding the core is a 600 km [[m...
36: ... also remarkable in that it has an axial tilt of only 0.01 degrees, which is over 300 times smaller th... - Printmaking (6788 bytes)
46: ...'' or [[newsprint paper]]. The wiping leaves ink only in the incisions.
70: ...er repels the grease in the ink, the ink adheres only to the oily parts, perfectly inking the image. - Eukaryote (9230 bytes)
33: ...takes place. They contain their own DNA and are only formed by the fission of other mitochondria. Th...
48: ...ternation between [[haploid]] generations, where only one copy of each chromosome is present, and [[di... - History of the United States (1918-1945) (54688 bytes)
38: ...mising technocrats of his generation. He was the only person elected to the U.S. Presidency who previo...
60: ...de. The banking system as a whole, moreover, was only very loosely regulated by the Federal Reserve Sy...
72: ...pe. Thus debts (and reparations) were being paid only by poling up new and greater debts. In the late ...
74: ...nts, and Germany was able to make those payments only because of large private loans from the United S...
88: Unlike many other world leaders in the [[1930s]], how... - Cloud (9947 bytes)
5: ...r even black if they are so thick or dense that sunlight cannot pass through.
93: ...ny particles of water are relatively dense, and sunlight cannot penetrate far into the cloud before it...
97: ...s. A greenish tinge to a cloud is produced when sunlight is scattered by ice. A cumulonimbus cloud whi...
101: ...y reflecting the long (and unscattered) rays of sunlight which are predominant at those hours. The eff... - Erosion (6998 bytes)
24: ...processes act very slowly, others occur very suddenly, often with disastrous results. Any perceptible ... - Mars (27704 bytes)
8: ... a quarter the surface area of the [[Earth]] and only one-tenth the [[mass]] (though its surface area ...
11: ... is thin: the [[air pressure]] on the surface is only 750 [[pascal]]s, about 0.75 percent of the avera...
22: ... mineral [[goethite]], which (unlike hematite) ''only'' forms in the presence of water, along with oth...
31: ...[[Mount Everest]] and the [[Mariana Trench]]) is only 19.7 km. Combined with the planets' different ra...
44: ... belief by some that life existed on Mars, due mainly to observations by [[Percival Lowell]] of [[Mart... - Jupiter (24639 bytes)
145: ... its composition can, as adding extra mass would only result in further gravitational compression (unt...
185: The only spacecraft to have descended into Jupiter's atmo...
223: So far the only spacecraft to orbit Jupiter is the ''[[Galileo s...
263: #The [[Pasipha렧roup]] is a disperse and only vaguely distinct group that covers all the outer...
275: * Jupiter is the setting of [[Stanley Kubrick]]'s classic film ''[[2001: A Space Odys... - Saturn (planet) (23300 bytes)
137: ...lanet)|Jupiter]]. Saturn has large rings made mainly out of ice and space debris. It was named after...
140: ...ith an average specific density of 0.69. This is only an average value, however; Saturn's upper atmosp...
144: ...t Saturn has a warm polar [[vortex]], and is the only planet in the solar system known to do so.
167: ...me gaps are cleared out by the passage of tiny moonlets such as [[Pan (moon)|Pan]], many more of which...
176: | [[Image:Saturn unlit rings.jpg|thumb|center|200px|''[[Cassini-Huygen... - Uranus (15207 bytes)
145: ...god]] [[Uranus (mythology)|Ouranos]], and is the only planet in the [[solar system]] named after a Gre...
149: ...omposed primarily of rock and various ices, with only about 15% [[hydrogen]] and a little [[helium]] (...
176: [[NASA]]'s [[Voyager 2]] is the only spacecraft to have visited the planet. Launched... - Neptune (planet) (18545 bytes)
138: Neptune has been visited by only one spacecraft, ''[[Voyager 2]]'', which flew by...
152: ...ry day; because it was stationary in the sky and only beginning the planet's yearly retrograde cycle, ... - Pluto (planet) (26470 bytes)
134: Pluto is not only much smaller and less massive than every other p...
136: ...n for many decades after its discovery and could only be estimated. The discovery of its satellite [[...
142: ... may in fact be a member of the [[Kuiper belt]], only one of a large number of distant icy bodies. A s...
153: ...]. Pluto and Charon are noteworthy for being the only planet/moon pair in the solar system whose [[bar...
177: ...roposed. This held that observers were measuring only the diameter of a bright spot on the highly refl... - Lightning (33113 bytes)
35: ...m several different objects simultaneously, with only one connecting with the leader and forming the d...
65: ... One special type of intracloud lightning is commonly called an anvil crawler. Discharges of electric...
71: ... which is nothing more than a leader stroke with only one return stroke.
93: ...s date back to at least [[1886]]. However, it is only in recent years that fuller investigations have ...
133: ...fficient energy strike the atmosphere on average only once per 50 seconds per square kilometer. Measu... - Seismograph (4037 bytes)
6: ...es, but those on the other side of the Earth can only record P waves.
14: ...gists generally prefer a vertical seismograph if only one instrument is possible. - Blue Whale (22203 bytes)
27: ...further separate subspecies in the Indian Ocean. Unlike the other three subspecies however, this last ...
34: ...es in shape from one individual to another; some only have a barely perceptible lump, whilst other fin...
40: Blue Whales most commonly live alone or with one other individual. It is n...
53: ...depth (more than 100 m) during the daytimes, and only surface feed at night. Dive times are typically ...
58: ...t Pacific (reported in Sears, 1998). The whales' only natural predator is the [[Orca]]. Calambokidis e...
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