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The study of geology also encompasses Earth processes which can affect overall civilization. An earthquake can destroy a large number of lives in a few minutes. Also, tsunamis, floods, landslides, droughts, and volcanic activity may have an enormous influence on civilization. Geologists study those processes and can recommend action plans to minimize damage in the event that such events will occur. For example, by studying flood patterns of rivers, geologists can recommend areas to stop when building new cities,towns, and residential neighborhoods in order to prevent future damage. Earthquake science, although a very difficult division of study, might help minimize problems for life and civilization by estimating where earthquakes are likely to occur (referred to as fault lines) also to recommend the technology to use within the construction of buildings over these vulnerable areas. Plasma can often be called the fourth state of matter, after solid, liquid, and gas. It is also sometimes described as an ionized gas i.e. a gas when the degree of energy is really high how the electrons escape from the atoms. This leads to soups of charged particles that happen to be overall quasi-neutral. Between June 25 and 26, 1876, a combined force of Lakota and Northern Cheyenne led the United States 7th Cavalry into a battle near the Little Bighorn River with what was then the eastern side of the Montana Territory. The engagement is famous by several names: the Battle of Greasy Grass, the Battle of Little Big Horn, and Custer's Last Stand. Perhaps the most well-known action with the Indian Wars, it turned out an amazing victory for Sitting Bull with his fantastic forces. They defeated a column of seven hundred men led by George Armstrong Custer; five of the Seventh's companies were annihilated and Custer himself was killed inside engagement in addition to a couple of his brothers along with a brother-in-law. Known as the battle that left no white survivors, Little Big Horn has inspired greater than 1,000 artwork, including over 40 films. Here are four with the best...