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170

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170

c. 400 BCAD c. 250Central America [everyday life]The Late Formative (or pre-Classic) period of Mayan culture takes place in Mexico. By 400 BC, large structures have been built at several sites in the tropical lowland jungle. In the highlands, people begin to put up large clay platforms, some the basis for temples and others for elite houses, flanking open plazas.
c. 200 BCAD c. 200South America [religion]During this period the Nazca Lines are drawn in the desert along the south coast of Peru. These are enormous stylized outlines of animals, including a monkey, whale, spider, and hummingbird, and sets of parallel lines, some as long as 20 km/12 mi. They are believed to be a development of Chavín de Huantar art; they may have had religious significance, or they may have been connected with astronomy.
c. 100–c. 200Central America [town planning]Great building projects are carried out in the pre-Toltec city of Teotihuacán in the Mexican Basin. A great central avenue is laid out, now known as the Street of the Dead. The Temple of the Sun is also completed, dominating the Street of the Dead; at 65 m/216 ft, it is the highest pyramid in Mexico. Another slightly smaller pyramid, to the Moon, is also constructed. Twenty further temples line the avenue.
167–170Roman Empire, Asia Minor, Greece, Gaul, Egypt, Italy [plagues and epidemics]Plague – probably bubonic – is brought back from the East by Roman troops. Asia Minor, Greece, Gaul, and Egypt are affected as well as Italy.
c. 170Greece, Egypt [births and deaths]Claudius Ptolemy, Greek scientist, creator of the Ptolemaic astronomical system which dominated Western science for over 1,000 years, dies, probably in Alexandria, Egypt (c. 78).


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? Mentioned in ? References in classic literature
 
It ignites at 170 degrees in place of 240, and its combustion is so rapid that one may set light to it on the top of the ordinary powder, without the latter having time to ignite.
The speed of the projectile seemed to him to be more than 200 yards, or about 170 leagues a second.
The shells, higher up on this terrace could be traced scaling off in flakes, and falling into an impalpable powder; and on an upper terrace, at the height of 170 feet, and likewise at some considerably higher points, I found a layer of saline powder of exactly similar appearance, and lying in the same relative position.
 
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