Intelligent Aliens: Artist's Illustration
We often imagine intelligent aliens to be humanoid, but this is unlikely for a number of reasons. (Image credit: Albert Ziganshin /

Aliens can refer to everything from little green men in the sci-fi realm to microscopic life forms beyond Earth. For all these possibilities, Live Science has you covered. We break down the latest discoveries that hint at life on other planets and the state of scientific searches for such extraterrestrial life. Sometimes, we may dissect a "little green man" sighting as well.

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