The odds of discovering another Earth are looking slimmer than once believed. A growing body of evidence suggests that truly Earth-like conditions are rare, and complex life even rarer, perhaps to the ...

In a blow to anyone dreaming that complex life may exist elsewhere in the universe, a new study suggests we're unlikely to find it around many of the most common stars in the galaxy.

Scientists now have direct evidence that a planet — not just failed stars — can rove the galaxy after a violent expulsion from its orbit. - NASA / JPL-Caltech / R. Hurt illustration Astronomers have ...

Humans are captivated by the idea of finding life elsewhere in the universe – and even more by the idea that life, if found, might resemble the complex, animal life here on Earth. One of the easiest ...