A new exoplanet model screens rocky worlds by their ability to retain atmospheres over geologic timescales, helping narrow ...

Scientists argue that limiting the search for life strictly to a star’s traditional habitable zone is too restrictive. That is in light of new climate models, and observations that suggest that liquid ...

A Stanford scientist says a new planetary model may explain why we have not found aliens yet, arguing that most small rocky ...

WASHINGTON — An Earth-sized planet in its star's habitable zone has been discovered in data from NASA’s Kepler space telescope. NASA says the newly found exoplanet is the closest to Earth in size and ...

There might be many more planets that could be home to aliens than we thought, according to a new study. For years, scientists have searched for life in the "habitable" or "goldilocks" zone – where it ...