Are we alone in the universe? Consider mysterious "extraterrestrial" radio signals. Unexplained gases on other planets.
Interstellar comet 3I/ATLAS carries isotopic ratios entirely outside the Solar System range, ESO’s Very Large Telescope has ...
Whether you believe intelligent life exists beyond Earth or think every unexplained sighting has a logical explanation, Thursday is a day to celebrate curiosity. World UFO Day, observed each year on ...
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Why the UFO phenomenon has fascinated Americans for decades
One pilot's offhand description in 1947 started a national obsession that never quit.
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