Extraterrestrial life, or alien life (colloquially, aliens), is life that originates from another world rather than on Earth. No extraterrestrial life has yet been scientifically or conclusively detected.

Jan 19, 2025 · Bottom line: Aliens probably exist according to a survey of more than 1,000 scientists. Nearly 87% of them believe extraterrestrial life exists elsewhere in the universe.

Nov 24, 2025 · Over the last decade, astronomers have expended great effort trying to find what traces of simple forms of life—known as "biosignatures"—might exist elsewhere in the universe.

May 24, 2025 · Discover interesting facts about where alien life forms are likely to exist, and what they look like.

Sep 10, 2021 · Do aliens exist? This is a really interesting question and one that NASA has been trying to understand, explore, and figure out for a long time. We have not yet discovered life on any other …

Jun 7, 2023 · Although there’s no evidence yet that aliens are out there — let alone that they’ve come to visit us — the likelihood of extraterrestrial life is so high that we simply must keep searching.

Nov 16, 2025 · Extraterrestrial life refers to life that may exist or may have existed in the universe outside of Earth. The search for extraterrestrial life encompasses many fundamental scientific …

Jan 16, 2025 · Are we really aliens out there, or are we all alone in the universe? Unsurprisingly, scientists think about it too. Now, a new survey published in Nature Astronomy analyzed what …

Aug 26, 2025 · With the rise of modern science, the question has become sharper, stripped of myth but not of awe: Are there aliens—or any other intelligent life forms—already here on Earth? This is not …

Dec 31, 2025 · Are aliens real? A Nature Astronomy study reveals 87% of experts believe life exists. Explore how 3I/ATLAS and AI are accelerating the search for E.T.