More than 2,500 alien plant species could find suitable conditions in the Arctic, especially in northern Norway and Svalbard.

Human intelligence wasn’t a cosmic evolutionary fluke, some scientists say. The case against cosmic loneliness is growing.

But the real truth is that alien life on other planets could be even stranger than floating balloons or amorphous organisms ...

While idea may violate Occam’s razor, “it remains a speculative but logically open alternative,” says biologist Robert Endres.

The former president appeared to confirm decades-old conspiracy theories. Lawmakers say Barack Obama is simply saying what ...

Is intelligent alien life really out there? With powerful telescopes identifying more potentially habitable planets each year ...

If we were to ever find alien life, breaking the news to the general public could be much more difficult than one might think ...

The new plot twist is that in order to keep enough nitrogen and phosphorus near its surface, a planet has to start out with ...

More than 3.5 billion years ago, the Earth was not the hospitable world we know today. The atmosphere lacked oxygen, the seas were acidic and rich in iron, and volcanic activity roared across a barren ...

Nature is truly captivating. A time-lapse video capturing the growth of an array of wild mushrooms in a forest is all the proof you need. (Click here to watch the video if the embed does not appear.) ...

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 ...