These are the 3 most likely scenarios for our first alien encounter

How we will find extraterrestrial life is just as important of a question as to when we will find the first alien life. Finding extraterrestrial life is not just a question of WHEN we will find the first life off the Earth, but HOW we will find it. We already know of more than 4,000 planets orbiting other stars, and that number will greatly increase in the coming years and decades as revolutionary instruments set their sights on alien worlds. A new study suggests that up to one-quarter of all exoplanets slightly larger than Earth could house liquid water on…

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