Alien existence and whether they will be a threat to human existence are some of the few questions that keep on lingering in the minds of peers and common people alike. Astronomers and scientists across the world have been and will be searching for clues to alien existence, till they either find one or they confirm that aliens are nothing but a worldwide hoax. Whatever the outcome may be, people should be ready to face it.

Though most of the alien existence theories are sci-fi and based on movies, it does not deter the importance of the real research efforts put in by experts. One such effort was to solve the puzzle of alien existence by the application of mathematical principles. In 1961, the "Drake equation" was proposed as a template, which someday may help people reveal secrets about aliens. Unfortunately, that someday has not arrived yet, Futurism reported.

The equation is based on seven variables, which represent the various cosmological factors related to the formation of stars. Though research is still going on as of the present, there is no firm evidence to isolate the variables and calculate the probability of alien existence. However, scientists are extremely optimistic that soon scientists will be able to solve the equation and find out the reality about alien existence.

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