Scientists believe life on alien worlds may be constrained by the same factors as on our planet.

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Science fiction suggests that life on other planets, if it exists, is likely far more advanced than life on Earth. A recent ...

Add Yahoo as a preferred source to see more of our stories on Google. An illustration of an exoplanet in an alien star system. New research suggests that radio emissions from intelligent aliens may be ...

Aliens lived on a certain planet.They had built a civilization far more advanced than Earth's.They had overcome disease, aging, and even death. As a result, the planet's surface became too small, so t ...

Seventy years ago, Italian-American nuclear physicist Enrico Fermi asked his colleagues a question during a lunchtime conversation. If life is common in our Universe, why can’t we see any evidence of ...

One day, probably far off in the very distant future, if astronomers are correct in their assumptions about the vastness of space, Earth will be visited by intelligent beings from another planet.