When thinking about other civilizations in our universe and what they might be like, we have to come up with a conceptual framework that can enable us to understand them better. Based on the limited sample of our own civilization, we may assume that any civilization in our universe would naturally want to consume resources to grow and expand to ensure its survival. Since the same laws of physics would apply to all civilizations in the universe, we can reasonably assume a standard of measurement in terms of energy use. In 1964, Russian astrophysicist Nikolai Kardashev figured that civilizations can be categorized by the total amount of energy available to them. He called it the Kardashev Scale. He initially came up with 3 civilization types; type 1, type 2, and type 3. However, other astronomers have recently extended the scale from type 0 all the way to type 6 as new theories in modern physics have emerged. When the Kardashev Scale was proposed, Carl Sagan, an American astronomer, and astrophysicist derived a formula to calculate any given civilization's Kardashev ranking in terms of its power or energy use over time. It is due to this fact that the Kardashev Scale is continuous in nature so a civilization can in fact be any value in between the given types. So let’s examine these different types of civilizations and some of the things they can accomplish.
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