There are a least a hundred billion stars in the Milky Way, our home galaxy. And there could be trillions of planets! That leaves a lot of potential real estate for extraterrestrials.
Let’s optimistically assume that we’ll one day find aliens. How might that happen? Maybe it will be like in the movies! They’ll visit Earth with their faster-than-light starships, hopefully coming in peace, like the Vulcans from Star Trek or the squid-like beings in Arrival.
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