3 Reasons Why Aliens Wouldn’t Visit Earth, Even If They Could

Scientific speculation on why we haven’t been visited aliens.

3D illustration of an alien robot exploring the Earth from Earth’s orbit. The robot in its spaceship, looking at the Earth through a big glass window.
An alien robot explores the Earth from orbit. Source: ConceptCafe, via Storyblocks.

As astronomers discover more about our Universe, the more we realize that Earth, and all those who live on it, are just a small piece of a grander cosmic expanse. Astronomers estimate that in our alone Galaxy, there are about 300 million potentially habitable…

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