A research team has developed a new approach to detecting life beyond Earth that does not rely on identifying specific ...

(cokada/iStock/Getty Images) Alien megastructures built to harvest stellar energy or alter the orbits of stars may be ...

Trump has ordered a UFO data release. But if aliens exist, what would they think of us? - For generations, human beings have ...

Over hundreds of thousands of years, humans somehow evolved a type of intelligence found nowhere else in the animal kingdom, at least on Earth. According to the most famous theory describing the ...

In these science fiction books, extraterrestrial beings are sympathetic, horrifying and everything in between.