ROB FINNERTY (HOST): And whether you believe in them or not, everybody has heard about beings from another planet. And the descriptions are almost always the same. They're smaller, big eyes, big heads ...

Alien megastructures built to harvest stellar energy or alter the orbits of stars may be physically feasible, according to a new analysis – satisfying both our sci-fi fancies and our innate yearning ...

Add Yahoo as a preferred source to see more of our stories on Google. (cokada/iStock/Getty Images) Alien megastructures built to harvest stellar energy or alter the orbits of stars may be physically ...

Data from the James Webb Space Telescope on exoplanet K2-18b has revealed the "strongest hints yet of biological activity outside the solar system," according to a University of Cambridge study.

Do aliens exist or not? That is the question. Well, one NASA scientist certainly seems to think there's a chance. Ivo Busko, a retired NASA developer who worked at the Space Telescope Science ...