Aliens have invaded the news again. Last month, two US presidents weighed in on the topic in rapid succession, managing to make a public that was already obsessed with extraterrestrials even more so.

Ever since physicist Freeman Dyson first proposed the concept in 1960, the "Dyson sphere" has been the holy grail of techno-signature hunters. A highly advanced civilization could build a "sphere" (or ...

Exoplanet atmospheric chemistry as a creative dataset Assembly theory, a framework describing life as a complex molecular organization beyond nonliving chemistry AI-human co-creation as a non-dominant ...

Space contains objects far more extreme than our Sun, including neutron stars, pulsars, quasars, white dwarfs, and black holes. Each produces radically different environments shaped by intense gravity ...

The Fermi Paradox asks a simple but unsettling question: if the universe is so vast, why haven’t we found evidence of alien civilizations? Scientists have proposed many explanations, but some of the ...

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Assuming intelligent aliens know how to harvest energy from stars, would humanity be able to spot these high-level structures? Reading time 3 minutes Assuming aliens do physics like us but are ...

A new generation of meagstructures is currently under construction across different continents, each designed to shatter long-standing world records for height, scale, or construction innovation. Far ...

President Donald Trump said Thursday he will direct multiple U.S. government agencies to declassify files related to aliens and UFOs. The move came five days after former President Barack Obama ...

One obstacle to figuring out why, exactly, parts of the American government have developed a strange fascination with “unidentified aerial phenomena” and “nonhuman intelligence” — in lay terms, ...