Scientists propose a universal test that could detect alien life without assuming it resembles any biology found here on ...

Are we alone in the Universe? With more than 100 billion galaxies in the observable universe and at least 500 billion planets in the Milky Way alone, don’t you think we should have found something by ...

It is often suggested that this may have already happened: alien technosignatures may have reached Earth during the past six decades but have gone unnoticed. If that is true, it suggests that more ...