Scientists have proposed building a lunar quarantine facility to examine samples returned from Mars and other celestial ...

How can radio astronomers successfully identify extraterrestrial radio signals while discerning them from Earth-based radio signals? This is what a recent study published in The Astronomical Journal ...

What are the chances that aliens would visit? Andromeda, pictured here, is our nearest galaxy. There are an estimated 100 billion galaxies – and 40 billion Earth-sized planets orbiting in the ...