in order to find our true reason of this phenomenon

The researchers are found in the center of Mexico near Lake Cuitzeo thin layer of a sediment found in the analysis of the "impact" clues, the precipitate, full 13000 years. The researchers found that the latest, these deposits also includes a "special" mixed nano diamond, suffered a blow to the small sphere, and some other substances, in particular some materials can only be formed at the cosmic collision conditions. The researchers speculated that, the "impact" is occurring in the critical period of the Younger Dryas, can be seen in some parts of North america. Although they have in the past few years, has been on the Greenland and West Europe had repeatedly "review" research. But this is the first time researchers conducted the research to the Mexico this tropical area. The researchers based on the current research results of view, feel very has the possibility is a diameter larger than a few hundred metres larger planet or comet with earth's atmosphere friction with the ground, and then a collision, then accompanied by collision on the surface of the plant burning, melted rock, the surrounding environment is also subject to interference. The collision hypothesis "is often known as the" Younger Dryas event". Clovis culture is also in this period in North America to rise, at the same time, this is the end of the last ice age. The researchers also said, in order to find our true reason of this phenomenon, verified on many assumptions, found in this process, the principle of any on earth are unable to fully explain this phenomenon. However, researchers can prove that here "impact" and "Younger Dryas" very well.