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Researchers demonstrated that Earth microbes can survive simulated conditions of Enceladus's subsurface ocean, strengthening the case that Saturn's moon could harbor extraterrestrial life.
NASA's Perseverance rover detected complex organic carbon molecules in ancient Martian mudstones that may indicate signatures of past microbial life from billions of years ago.
A Guardian podcast explores the Fermi Paradox—why humanity has not detected advanced alien civilizations despite the universe's age and vastness. The episode, adapted from a Columbia Global Reports book, examines theories about extraterrestrial life and technology.
This article explores the Fermi Paradox—the apparent contradiction between the vast number of stars and galaxies and the lack of detected alien civilizations—examining why we have not yet made contact with extraterrestrial life despite the universe's age and size.
Observations of the interstellar comet 3I/Borisov suggest it may be nearly three times older than our solar system and is the third known visitor from beyond our solar system.
Experts in the search for extraterrestrial intelligence have issued updated guidelines for communicating potential signals from intelligent life to balance transparency with preventing panic and misinformation.
Astronomers have detected erythrulose, a natural sugar, in a dust cloud near the Milky Way's center, demonstrating that organic compounds essential to life can form in interstellar space.
Readers discuss potential reasons why Earth has not yet encountered intelligent extraterrestrial life, with one letter suggesting that fossil fuel dependency may be a limiting factor in alien civilization development.
Readers of The Guardian respond to an article about an author's alien-chasing expedition in the United States and his book on UFOs and ufology.
A Guardian reader-participation column asking what music readers would play if an alien visitor asked them to explain the concept of music.