For decades, astronomers have chased fleeting hints that something alive might be lurking beyond Earth, only to watch each candidate fade under scrutiny. Now a distant world called K2-18 b has ...

Is intelligent alien life really out there? With powerful telescopes identifying more potentially habitable planets each year, the possibility continues to grow. But what would happen if we actually ...

Add Yahoo as a preferred source to see more of our stories on Google. A composite view of Mars taken by the Viking I and II probes. NASA/USGS In September, NASA announced the discovery of a possible ...

The afternoon of 7 August 1996 isn’t a time that sticks in many people’s minds. But if things had worked out differently, it might have been etched into our collective memory. At 1.15pm, US President ...

Answers to some of those questions could finally become public after President Trump's call last week for the release of ...