Do aliens exist? Few debates have proved as enduring – or as divisive – as the question of whether there is life beyond Earth.

"If a signal gets broadened by its own star's environment, it can slip below our detection thresholds, even if it's there." ...

A viral podcast moment last month reignited speculation about extraterrestrials and prompted President Donald Trump’s commitment to kickstarting the release of government files on flying saucers. But ...