The American government has identified four distinct types of alien life, a former CIA-backed advanced weapons researcher has ...

Could there be life on other planets, and if so, what would it look like? Astrobiologist Lewis Dartnell is hunting for alien life in whatever form it takes. Join him as he explores how life developed ...

Scientists hunting for life beyond Earth have long thought that water is one of the key indicators. But a group of experts now says that looking for life on water–rich planets could be a waste of time ...