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On Dec. 19, 2025, 3I/ATLAS flew by Earth and did more than just give astronomers something to look at; it brought a piece of a far-off, alien world into our backyard. This cosmic vagabond moves at an ...

SETI scientists have detected signals that don’t behave like anything found in nature — narrowband, repeating, and drifting as if something is moving fast. Could these be side effects of alien ...

Nearly five decades after its discovery, scientists have confirmed that the “Wow!” signal—still the most tantalizing radio burst ever detected by SETI—was significantly stronger than previously ...

The interstellar object 3I/ATLAS was discovered on July 1, 2025. There is currently no evidence to suggest that it is anything other than a natural astrophysical object. However, given the small ...

In November, SETI Institute researchers contributed expert perspective to media stories on interstellar comet 3I/ATLAS and recent experiments testing the survival of plant life in space. The coverage ...

In August 1977, a radio telescope in Ohio that was part of the Search for Extraterrestrial Intelligence (SETI Institute) picked up a brief, powerful radio signal from space that no one has ever been ...