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Aliens just visited Earth. Here’s what happens next

Are we alone in the Universe? With more than 100 billion galaxies in the observable universe and at least 500 billion planets ...
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What if aliens are actually humans from the future?

What if you found out that you had a long-lost relative? And what if that long-lost relative was from a different planet in our galaxy? And what if this faraway planet was home to billions of humans, ...
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Where are all the aliens?: Fermi’s Paradox explained

“Where is everybody?”: This question, about the lack of aliens in the vast universe, is called Fermi’s paradox – Copyright NASA/AFP/File HO Astronomers raised ...