The Drake Equation Estimates How Many Alien Civilizations Are Out There

The Drake Equation Estimates How Many Alien Civilizations Are Out There

Dr. Frank Drake presented the Drake Equation in 1961, not as a definitive way of determining the number of extraterrestrial civilizations in our galaxy, but as a theoretical tool for estimating how many may exist. It takes into account factors such as the number of percentage of stars that have planets, the chances of a plant developing life, and average life-span of intelligent civilizations. The equation is not foolproof, and can result in a broad range of answers depending on how optimistic or informed the user is. However, many scientists look at the equation as a useful and interactive symbol for the probability of life on other worlds.

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