Tracing Extraterrestrial Life: Scientific Evidence, Space Exploration, and Clues from Artificial Intelligence

With the advancement of space probes, robotic explorers, radio telescopes, and data analysis technologies, the amount of accessible information about the universe has increased dramatically. The integration of artificial intelligence has further enabled rapid organization and identification of complex cosmic signals and chemical data. Despite these developments, humanity has yet to confirm the existence of extraterrestrial life. However, a growing body of evidence from meteorites, space missions, radio signals, historical records, and AI-driven analyses is gradually assembling potential clues, suggesting that life may not be confined solely to Earth.

The first category of evidence comes from meteorites. The Orgueil meteorite, which fell in France in the 19th century, represents one of the earliest and most debated cases. This carbonaceous chondrite, rich in organic material and water, contains molecules considered strong biosignatures, including amino acids and chlorophyll degradation products. Under high magnification, numerous structures resembling microfossils have also been observed. Although early researchers questioned whether these features resulted from terrestrial contamination or mineral artifacts, subsequent studies ruled out pollen contamination and confirmed that both the organic compounds and structural features originated within the meteorite itself prior to its separation from its parent body.

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