The Kardashev Scale is one of the most widely discussed scientific frameworks for measuring the technological advancement of civilizations, from planetary energy use to controlling entire galaxies.

With the release of "Disclosure Day," Steven Spielberg's new film about aliens, a question as old as science fiction itself resurfaces: If aliens were to arrive on Earth, would they come to conquer us ...

The age of our universe and the commonality of Earth-like planets indicates the possibility of alien civilizations either ...