Using NASA's Transiting Exoplanet Survey Satellite (TESS), an international team of astronomers has discovered a new ...

Are aliens real? The question has animated conspiracy theories for decades and enthralled at least one former president of ...

A viral Obama podcast answer about aliens prompted Trump to accuse him of revealing secrets and promise to release UFO files ...

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When NASA’s MESSENGER spacecraft orbited Mercury, it uncovered a planet far more complex than expected. Despite surface temperatures exceeding 430°C (800°F), scientists confirmed water ice trapped in ...

Far beyond Neptune, in the frozen depths of the Kuiper Belt, many ancient objects oddly resemble giant snowmen made of ice ...