Mystery of Mars Canal.

Canal is an artificial channel dug. .If you recognize the canals on Mars to an admission that intelligent life exists on Mars, this is a stimulate interest in the issue. .Canals on Mars was first pointed out, is the Italian astronomer Gauss Apa Lei Li. .He in 1877, the perihelion of Mars and Earth using the opportunity to meet with a 24 cm diameter telescope observations of Mars, found in the surface of Mars some obscure circle a straight line, the dark line to link up one dark spot. .He also found that after continued observation, and some dark line width of 120 km, 4,800 km long and stretches to form a network covering the continent of Mars. .And found two dark lines parallel to each other, as well as seasonal variation. .He will also to chart their findings, the public of the world. .Start, Nowitzki Apa Lei Lee speculated that only a dark line connecting the Gulf waterway, has not stated that this is artificially dug. Canal, but 80 years of the 19th century, his discovery has aroused concern, some people say that these dark lines .canals dug by intelligent beings is, this person is the U.S. Lowell. .Lowell was the discovery of Gaussian Apa Lei Li fascinated. .In order to observe Mars, his own money in the construction of an observatory in Arizona. .After years of observation, not only confirmed the discovery of Gaussian Apa Lei Li, also a new found hundreds of new channels, said the Martian surface like a "spider web" of a set. .He also wrote three books his own observation: "Mars," "Mars and its canals," "Mars - Life's residence." .In his view, because the air is very thin surface of Mars, which led to water shortages, the composition of the ice began to melt the summer polar cap of Mars as water channels on Mars, the purpose is to lead the water on the polar cap arid tropics for .where the field of irrigation. .See from these waterways are central to the confluence of the continent, apparently purposefully dry. .The dark spot is the oasis. .Lowell's theory has aroused great interest, and soon swept the world. .However, Lowell's theory is not one-sided, and are constantly being challenged. .Such as the United States, Ba Yuede to believe that the dark lines on Mars are not the straight, quite irregular, and is broken, the Greek Antonio Adi through their own observations, support Barnard's view that the Mars .The dark lines said to be the canal is simply the illusion of eyes, "who are too rich imagination." Since the emergence of this view, the myth about the Martian depression gradually down, the United States, "Mariner" further proof of the detector 9 .the existence of canals on Mars is false. .However, "Mariner" 9, there is a surprising discovery that Mars has many geological structure similar to the riverbed, and its location and Lowell portrayed different. .The bed was divided into three categories on Mars, the flow of the river bed, out of bed and bed erosion, and river bed on the planet very similar to their sub-fold, about long, long time ago, Mars once had a warm climate, its over .with the atmosphere, there is precipitation, to ensure that the river exists. .Later, the "Pirates" No. 1 (1976) not only confirmed the existence of canals on Mars, also confirmed the existence of artificial construction </ p>.